I own a pair of Fritz...different model (REV7 SE). No argument with their basic bookshelf box shape but they look nice in person. My baffle measures a hair under 2 inches & she is solid..lined with no-rez as well.
Yeah, they may be "standard" ScanSpeak drivers but still better than what some other companies use as their proprietary drivers.. of equally & more expensive priced speakers.
But in the end it's the crossover design, driver capabilities, & enclosure all together that makes the Fritz different than other bookshelves. And there is a difference. When it comes to crossover design he has found a formula that works well. The speakers will sound great with any amp of decent quality. Any topology, low power, high power, class D to Tubes. That is my personal experience anyway. Great dispersion laterally & vertically. And yes.. they disappear well. The one characteristic or subjective perception I have that is hard to explain but easy to identify vs many other bookshelves is the ease & effortless sound. Maybe that seems like a corny thing to say but there is just something different going on. Whatever it is I personally dig it.
So while maybe there is some legitimate argument over enclosure & price of drivers the end result gets no argument from me. No criticisms. We all have personal preferences in sound & performance so I'm sure they aren't for everyone. I do think you could do a lot worse for the money though.
For a lot of us the subjective visual or soundstage perceptions of a speaker is a big deal. For me it's the best part of putting an audio system together. I think the Fritz do a good job of this.

