In my opinion these acoustic tiles are a great addition to any small setup, they fit together nicely unlike other makes where the edges wont line up for love nor money. They fix to the wall easily and (based on my experience using a carpet adhesive spray) will peel off the wall without leaving chunks behind if you should you later realise that your original positioning is just a bit wonky.
As with many low cost acoustic treatments they are rather thin, measuring about 5mm at the base, so in terms of sound reduction it only really effect frequencies along the higher end of the spectrum. In some cases this is all or exactly what is needed, but if you (like myself) need to tame frequencies further down the spectrum you can either mount them with a small air gap between the foam and your wall/surface (using a 1'' frame for example), or use two tiles on top of one another. By doing this a lot more of the midrange frequencies are dulled down.
Basically any small setup could benefit from acoustic treatment, for those looking to save a few pennies in the process these are ideal, and can be adapted to help absorb further down the midrange if you are prepared to be more creative when mounting them.
