I toured Air India's new A350 business class after flying its old 777 product for 13 hours. The difference is night and day.

Air India was considered the gold standard of aviation during its heyday — it even inspired the business model for Singapore Airlines, now considered one of the world's best carriers.

Under state ownership, however, Air India fell from grace, with customers regularly complaining of broken and filthy seats, bad on-time performance, and poor customer service.

"The list of things to do at Air India, and the list of opportunities ahead of us, are astonishing," Air India's new CEO, Campbell Wilson, told Business Insider in January. "And, in most of these cases, it is not a matter of 'Is there a case to do it?' but 'What do we do first?'"

The record deal, announced last February, was Air India's first aircraft order in 17 years and is worth a whopping $70 billion at list price.

The widebody jet boasted a fully transformed cabin, including sleek new economy, premium economy, and business-class seats.

The A350 business-class hard product — everything physically connected to the jet — is that of Russian carrier Aeroflot.

Air India obtained Aerolot's A350 after Western sanctions prevented its delivery. It kept the original seat design and added its own flare.

Each of the 28 business-class seats features a full sliding door, meaning each person can cacoon themselves off from the rest of the plane.

The middle-section seats have dividers between them.

The old seats had no doors, and its awkward 2×3×2 layout meant someone could be assigned the dreaded middle seat — even in business class.

And, there was no direct-aisle access, meaning passengers in the window and middle have to step around their neighbors.

The doors towered high enough that it would be difficult for other passengers to easily peer into a neighboring pod.

According to Wilson, the design for the new business class came from conversations with five-star carriers like Singapore, Emirates, Qatar Airways, and All Nippon Airways.

It's easy to see the inspiration in the new product. The sliding doors may come from ANA and Qatar, for example, while the different storage areas were likely cherry-picked from one or more.

The closets in the window seats are smaller than the ones in the middle section, but they can still fit longer garments like dresses and coats.

The side table was big enough for a glass and snack, while the cubby held my sneakers. The cupholder was good for a water bottle, and I stuffed everything else I needed into the seatback pocket.

Customers can expect more organization space on the new A350 product, though.

The bed on the old 777 was comfortable, but the new bedding is a definite upgrade.

Air India designed a pillow that converts into a mattress pad. You can see the opening in the photo, although I didn't notice until it was pointed out to me by one of the representatives.

The 2-in-1 is convenient for storage and efficiency and is just one of the myriad bedding elements included alongside more pillows and fluffy blankets.

The slight slant at the bottom half of the legacy bed did not bother me because I'm short and sleep curled up, but taller travelers may find it uncomfortable.

The new A350 bed is fully flat, though.

Wilson told BI that Air India hopes to one day compete with the elite carriers it took inspiration from, and I could see this shine through with the attention to detail in the soft product.

I particularly liked the purple throughout, which is a nod to its merger with Vistara.

The aforementioned pillow-mattress pad combo is another example of Air India's incredible A350 soft product. The carrier also boasts improved silverware, plates, and amenity kits onboard.

My absolute favorite, however, was the glass cheese platter because its two parts came together to resemble "The Vista" — Air India's gold, window-shaped logo. I thought this was clever.

Air India does not deny its old 777 business class is uncompetitive, but I could tell that it is trying to make up for its shortcomings where it can — and the best way is in the soft product.

On my 13-hour trek to India last month, I liked the Tumi amenity kit, pajamas, slippers, linens, and tableware — but the A350 elevates that to a better, more luxurious level.

The bar was stocked with high-dollar liquors like Johnnie Walker Black Label and Grey Goose.

Although there isn't an accompanying bartender or lounge area, this is another good example of where the world's best airlines have inspired the reimagined Air India.

I liked the wine and beer served, though I didn't try the liquor — mostly because I'm not a fan of mixed drinks, anyway.

The Bier 91, an Indian craft beer, was my favorite.

The charging outlets on my 777 flight were broken, though the flight attendants tried to fix it to no avail.

I also had a remote, which worked OK, and a flimsy tray table. These amenities are upgraded on the A350 and better resemble the premium business class Air India is going for.

Air India is notorious for holding parts of its business class and economy class seats together by duct tape — which I found to be true on my flight.

Travelers flying on Air India should check the plane they're flying on before booking to see which product they're paying for.

Note: Air India also has its legacy business class on Boeing 787s.

Air India passengers flying from San Francisco to Delhi, for example, may find themselves on a Delta 777 business class product.

Meanwhile, those flying between New York-JFK and Delhi (like me) will be on the legacy 777.

This means its dated 777 and 787 business-class cabins will be gone, though not until at least late 2025, according to Wilson.

"By the end of 2025, the entire legacy widebody fleet will also be upgraded to match what we're getting on the A350," he told BI, "So, essentially, our fleet will be completely reborn by then."