That is where I picked up the rotating assy in my sig. All parts were high quality name brands. The only problem I had was the piston rings. The kit had low tension rings, which might be ok for racing applications (assuming the builder knows they are low tension), but for a street motor they create way too much blowby. I did a leak down test: it was 20%. I had no choice but to rebuild it.
Just make sure you specify the bore size, piston dish, ring package, and anything else you can think of. They did swap out the pistons in the kit for me, so that I could get the low compression I was after. No additional charge.
I am happy with the purchase. Just don't expect them to design the motor for you. Decide what you want before talking to them. This should be done with any aftermarket purchase though, regardless of the company.