I just arrived home in Brooklyn after flying SQ22 in J on April 15. I tried and failed to get one of the bulkhead seats 48 hours and then 24 hours out. So, I ended up in my originally-picked 25A, an aisle seat about halfway through the rear J cabin. I am 6'2" and ~210 lbs, so I had low expectations after reading this thread and the SQ21/22 thread.

I thought the seat was fantastic.

Storage: I loved the sliding-door compartment in the top-left corner of the console. That's where my eye mask, glasses, earplugs, hand sanitizer, and moisturizer go. I also liked that it is "legal" to keep a small bag beneath the console during takeoff and landing. The headphone bin was also useful for keeping my phone connected to the AC plug but out of sight during the flight. The seat storage was so much better than the 2006 J product that I am most familiar with from SQ25/26, especially non-window 2006 J seats, since they lack the large bin on the side. The ledge on the console for drinks was nicely out of the way. I didn't fear dumping a cup of coffee all over the seat by bumping it with my arm or elbow. The table effortlessly adjusted vertically, and also could be angled JUST enough out of the way so I could exit the seat without folding the table away.

Sitting: The seat had a very comfortable upright position that is good for eating. In a lot of J seats, I feel like there is a major splatter risk (especially from noodle soup) unless I awkwardly sit forward and hunch over the table. I have definitely ruined a shirt with spicy oil in the BR Royal Laurel seat before because I neglected to hunch over the table. I didn't find that was necessary with the SQ A350 J seat. The seat is very supportive and just soft enough. I think the seat would also be ideal for working on a laptop, and also because the table glides up and down for good keyboard positioning.

Lounging: This was the only drawback to the seat, since you DO have to angle your torso so your feet can go in the footwell when the seat is maximally reclined. However, I didn't think it was that bad. The seat is wide and it has such a high side that I just used the big square pillow to make the angled position comfortable. It wasn't nearly as comfortable as the QSuite or BR seat for lounging, though.

Sleeping: This was the seat's biggest strength. I am a big person, and I loved the room for my shoulders and arms when the seat was in flat bed mode. I am a side sleeper, and I found that my arms and legs all had a place to go when lying on both sides. This made the seat better than reverse herringbone seats like the BR seat, which is narrow and constrains side-sleepers. The seatbelt was comfortable, much more so than the 2006 J seat. It was easy to roll over without being impeded by the belt. I also had room to lie fully extended on my back without my feet touching the end of the footwell. Lying diagonally wasn't weird because the flipped-over bed is a smooth surface—there aren't any cushion gaps to make you feel like you're at an angle. The footwell is indeed narrow, but it is also tall, so my size 12 feet had plenty of space vertically when lying on my back. Folding the seat to make the bed (and vice-versa) was a little annoying. I could fold it out myself, but I didn't have the ability to fold it back. Luckily, SQ FAs are always available to help. Their method was actually to sit on the edge of the bed and use their body weight to unlock it so it could be folded back, which was really funny and a complete design flaw in the mechanism. Despite this, the fold-out bed provided a seamless sleeping surface and a clean storage space for the blanket and the 2 smaller pillows so you don't have to deal with them in sitting/lounging mode.

Screen/controller/controls: The screen is of high quality, but I wish it was touch-enabled. The newer KrisWorld LOOKS like a touch UI, and the screen is so close to your face, it feels unnatural to reach over for the controller to do things. I didn't mind the controller, though, and the whole system was nicely responsive so who cares. Some folks have complained about bumping the controls on edge of the seat, but that didn't happen to me. I thought the seat lighting was bright but well-focused.

Location: The bulkhead seats offer more space for sure. But the row 15 bulkhead seats are next to the middle galley, which seemed to be the main galley on SQ22, and was almost always busy. There are also toilets here, so passengers (not FAs) are always leaving the curtain ajar on bathroom trips. The only J seats I would definitely avoid are the ones at the rear of each J cabin, especially in the back of the second one. Due to the fact there are only 4 toilets for J passengers on the ULR, there were sometimes people waiting their turn and that waiting area was close to these seats.

Overall: I think the SQ A350 seat is tied with the QSuite, and better than the BR seat, which is the (excellent) J product I have spent the most time in. It is way better than the 2006 SQ J seat and it blows away the old SQ regional J seats. As a side sleeper, it is also more comfortable than the coffin-like J seats on LX, CA, or CZ.