I have some experience with them too. Recently I have back-ordered a domain at them and they did beat Namejet, Snapnames, Pool, Name, Hexonet and some others. I know this because I did backorder this domain too at all these other drop catchers. Of the +/- ten times I back-ordered a domain at Backorderzone.com, one was a success, so in my case they have a success rate of about 10% which is pretty good I think. Everything, bidding, payment and delivery went smoothly. Transfer-out is still pending, but I guess that won't be a problem too.
Final price = bidding price + $49 (1 credit). When you are the only bidder, the price is $49.