I have built/assembled the Seas A26 and Satori Helios Textreme kits available from Madisound.
In both cases I concluded the resulting performance is on par with commercially available speakers that retail for >3X the price of the assembled kit. They are indeed a bargain in that sense.
The Helios performs better, but it’s also the more expensive kit with costlier drivers.
That said, for those who want a complete speaker that gives similar performance value, look no further than the Philharmonic HT Tower speaker—stupidly good value in the world of finished speakers.