I bought this kit simply because I like building kits. If they are inexpensive, I build them and give them away. At the time of this review the kit was $125. Cheap enough. But once I built it and connected it to my Magnepan LRS and KEF LS50 Metas, as a bi-amped system, using the ACA Mini above 70hz.....This little amp ain't going anywhere! I have a Pass Labs First Watt F5v2 that is my absolute reference amplifier. I've tried dozens of A,AB,D, Tube amps and nothing sounds as good as the F5v2.....but other than raw power, this little guy holds its own. Easy to build and fun to set the bias as it is a little challenging. You really need two VOMs and solder in a few little pieces of wire at the test points to allow easy connection with small alligator clips and you'll be in "High Cotton"......A nother issue is reading the resistors so you insert the correct ones. You need a good OHM meter and I recommend a auto calibration version. About $50 at Home Improvement Big Box stores or Amazon. If you are into this kind of stuff you should have one anyways. I mounted mine in an aluminum cabinet I built out of scrap, but I didn't like the looks. Finally I mounted it exposed on a wood base and added a level control to make balancing with the subwoofer easier. Get one and build it...You'll LOVE it!