Daz,
I've been using one of these for a couple of weeks and for me it has been faultless. I was bit worried it wouldn't work on my 3 year old 800AMD PC but it's fine. Burnt a few cheap DVD+R's and some dearer Ritek DVD-R's. CDR's are a breeze burning in about 4 mins.
If you can find one it's well worth it.