An excellent compact all purpose roller but expensive.
The compact size makes it easier to bring with your other gym equipment.
Still wide enough to roll through the entire back so you don't need to carry two sized rollers.
The compact size takes up less room on the gym floor where space may be limited between you and others.
The compact size makes it easier to get into difficult parts of the body to roll out.
The deep tread design allows for a stronger massage effect by controlling the pressure applied. During a rolling activity you can pause over a raised section of the tread pattern (or roll slightly forwards and backwards) for extra effect.
The tread pattern carries to the ends of the roller so it can be used in a sideways motion much the same way as a spikey massage ball.
As new the roller requires a few sessions to normalise.
A vented carry bag or carry strap might be a useful addition.
It is an expensive roller.