I flew on Spirit Airlines' newest jet and the quiet cabin and modern interior couldn't make up for bare-bones seats and lack of amenities

The first sign that I was on the new aircraft came as I peered at it through the terminal window and noticed the huge engines, which is the key identifier in telling an Airbus A320neo aircraft apart from a current-generation jet.

The Pratt & Whitney PW1000G geared turbofan engines offer 16 percent fuel savings compared to older engines.

They're so big that it almost looks like they're about to touch the ground.

The other tell is the sharklet, which provides additional fuel efficiency. Though, these are also found on some current-generation Airbus A320s as well.

All of these new jets come in Spirit's taxi cab yellow livery, an homage to their low fares, and this plane was only delivered in October.

Source: Planespotters.net

The jet is one big economy class cabin with 182 seats across 31 rows. For comparison, a new JetBlue Airways A320 seats 162 passengers across 27 rows.

Read More: I flew on a newly upgraded JetBlue plane and despite less legroom and slimmer seats, the refresh is exactly what the airline needed

Source: SeatGuru

The first two rows feature the "big front seat," or Spirit's version of business class.

There are no middle seats in this eight-seat sub-cabin and the standard seats are replaced with large 20-inch wide recliners with adjustable headrests and 36 inches of pitch.

Source: SeatGuru

The seats yield a premium but don't come with any extras like a free drink or snack, though a flight attendant told me that the airline has some upgrades in the works in that department.

This was my automatically assigned row, 23, just behind the engines.

I was a bit surprised that I was assigned a seat this far back despite the plane being empty but I didn't mind much as there was nobody around me for rows and rows.

Legroom was below average at 28 inches of pitch

Source: SeatGuru

And the seat width was only 17.75 inches.

Source: SeatGuru

The seats are noticeably more modern and sleek, which is the only compliment I can give them.

Here's what they look like on an older Spirit Airlines jet from a flight I took in August.

Read More: I flew on the infamous Spirit Airlines for the first time and saw how well no-frills can actually co-exist with safety – here's what it was like

Though sleek and modern, they were still nearly paper-thin and I felt it as soon as I sat down. Luckily, this was only a 41-minute flight.

The legroom was decent but only if I stayed in the same spot and didn't move at all.

It's even less space if you put a personal item under the seat.

In ultra-low-cost fashion, these seats also don't recline. While potentially uncomfortable on longer flights, a plus is that you don't have to worry about the person in front of you encroaching on your personal space by reclining.

And seats come with only a tray table, armrest, and small literature holder. There's no seat-back pocket.

This was the scene on the flight when the boarding process completed. Less than 30 people were onboard and entire rows went empty.

With it becoming clear my row would be empty, I slid over to the window seat.

I had a direct line of sight to the sharklet I discussed earlier, which greets passengers with a friendly "howdy."

Our plane was so light that we took off just a few seconds after accelerating down the runway, a testament not only to our weight but to the power of the large engines. But even still, the noise levels were quite low.

The next few minutes were dedicated to sightseeing as we traveled parallel to New York City.

It's on flights like these that seat selection becomes critical to get the best views.

Read More: I've taken over 100 flights in the past 2 years — here's how I choose my seats when I fly to get the best possible experience

The flight was uneventful upon reaching cruise altitude and there was no in-flight entertainment aside from the views since these jets don't feature any seat-back screens.

A fleet-wide installation of in-flight WiFi is scheduled but has been long delayed.

The biggest selling point for passengers is the low noise level. Having flown on an Airbus A320neo in the past, I was well aware of the quiet cabin but it still impresses me every time.

The flight attendants performed a quick in-flight service by walking down the aisle and taking orders but nothing on Spirit is free, not even water, so I passed.

Soon enough, it was time for landing.

We touched down in Boston exactly 41 minutes after departing from Newark with no issues. It was a calm, smooth, and quiet flight.

Would I fly this plane again? Absolutely, but I'd think twice on anything longer than three hours.