I have not had any problems with them. I use them for just about everything. I received the wrong door panels once and they took care of picking them up and sent out the correct ones in advance so that I could make it to a show. Very cool.
I've used D&R for - ahh...Firebird stuff - and for my 68 Camaro. Sometimes it seems I have to wait a long time for parts - much longer than Y1 or Classic. Always price check - sometimes they have great prices, others they are way high. Quality has never been a concern.