I play on my laptop, since it is more convient for me. Although my laptop has a small screen, It appears to be just fine for playing poker,
Good luck at the tables,
I usually play on a computer or mobile, but I also prefer to play on a computer because of the bigger screen, so I can more easily follow the current development of the tournament there.
I've always played from my phone, and I'm used to it. Of course, it is limiting to play several tables. but it is comfortable because I can play lying on the bed or on the furniture
I always try to play on the computer, I think it's better than playing from the phone, or tablet, since on the computer you can have better vision and analysis
I play 80% of my MTTs on PC because it's convenient. But sometimes I have to play on my smartphone (due to circumstances). It's not comfortable to play on a smartphone, because the applications are often jammed.