The quality of materials is excellent and the unit drives IEMs well without adding unnecessary noise. There are cheaper units, but I would rather have this in front of my ears when someone drops a mic on stage. The presence of a limiter alone makes this superior to the passive version in my opinion.
I find the quoted battery life quite conservative in my use case, which is nice as opening the unit is somewhat of a hassle. I find it's a good idea to use a tool like a key, or a pen, to properly push in the locking button before carefully sliding out the assembly.