I've got a pair of their 15x10 rallys I bought off of a member here (but they were new, had never had tires mounted or anything) and the fit and finish on them is excellent. The shop that mounted the tires said everybody that walked by them stopped in their tracks and asked about them.
I have used them quite a number of times with good results. You might consider calling Then and Now. The are a vendor on this site. Their pricing us usually better and they speak Buick. You could also call Curt McKim who is also on the board here. Curt does nice work and makes his own wheels.
I bought mine from DR Performance. They can do any size, any backspace and the wheels were beautiful. I paid $257 shipped for 2 about 1-1/2 years ago. I called after seeing an eBay add from seller Lakotdrs, (503) 688-3013
Check them for true on a balancer before you mount tires; whoever balances them needs to use a lug-centric adapter. Most tire shops don't have this adapter so you might have to call around. Some shops won't even know what "lug-centric" means.
