I've used it plenty of times. Just used it today. What do you want to know? It's as hard or easy as you want to make it and I think it's a good addition to a workout routine.
I used. I really liked it! Places practically does not occupy. The variety of exercises is incredible. And most importantly, the results of training do not make you wait
I don't have a trx but I do have some webbing straps & oly wrings which I used to use which does pretty much the same job as a trx only much cheaper....the only difference is ease of adjustability.