I don't have experience with their rifles, but I have used a Kaiser US BCG before, and it was quality (properly staked, fit/finish was smooth and even).
That said, I took a look at their rifle offering.
At first glance, it seems expensive for a polymer receiver rifle.
On second look, the noticeable seams on it make it really expensive for a polymer rifle.
I'm not sure if it uses internal bracing, or if it is 100% polymer receivers. Either way, I don't think I could justify the price based on what I'm seeing from their photos.