Balls feel good. Compared weights against a US Open ball and they were almost identical weight. Using these balls in my ball machine. Balls are comfortable to hit with, the bounce is good. I like these better than the pressureless Penn's. So far so good.

I love using these pressureless balls! They last longer and so much better for our environment.

Okay, so these pressureless balls are excellent, honestly one of the best purchases I've made in recent history. Seriously.

I'm teaching my 15 and 13 year olds tennis. I've never used or even heard of a ball like this...airless, no worries about decompression with aging. These things are fantastic. And reasonably priced.

As others have said, they absolutely feel and react as well as typical balls that are maybe a week old. Not SUPER springy or tight but really, really good...and for our purposes, they are exactly straight up perfect. The felt is great, they hit great, very high quality, all good.

So between this case of balls, and a fantastic, rolling, ball picker-upper we got from NEEWER, and a wheeled ball caddy from PunzQ Sports (on Amazon), we are SET for practicing. We just put in a long, really great practice today, and having tons of balls, a quick way to pick them up, and this caddy...the whole experience was extremely pleasurable. I can't recommend these pressureless balls more highly.

Feel very similar to week old pressurized balls and have great durability.