my experience with dss was very short. i called and talked with them in detail about what i wanted and requested a quote for a nearly complete engine (longblock plus balancer, timing cover, oil pan, etc.....). i waited for a fax for nearly an hour. i called back when it never arrived and requested the quote by e-mail. the answer was along the lines of "i dont have time for that." i was a little bothered but no biggie. i asked him to fax it again to a different fax number just in case the original machine was having a problem. that fax never came either. i never bothered to call back. i cant remember the name of the rep i talked to since i am going back more than a year now but my experience was discouraging to say the least. i have seen great products from them, but my experience (which there is a good chance was isolated incident with someone having a bad day) was enough to make me finalize my order with chp. having a quality product only counts for about 50% with me. the rest is in the customer service before and after the sale.