The device worked straight away (well I had to charge it) and was so easy to use that I didn't bother with the instructions. I've already got a dvd ripper on my computer and that saves it in .avi format that works without the need for all the extra plugins. The plug ins are a bit of a rip off and should be included with the product that I payed for.
Anyway, very easy, fairly compact, brilliant sound, picture and build quility, can't fault the product but the plug ins are bad. If your going to buy one I would recomend that you get the 80gb one like I got or the 120gb one becouse I filled up over 40gb with all my stuff and i'm bound to get more that will want to go on. If you have your films in .avi format thats good, but if not get some software that will save it in that, plus anouther note, .mpeg to .avi converters files don't work on the 504 if thats a problem for you.
Overall, buy the product but don't think that the price your paying to get it is the overall price, add in all the extras aswell, dvr station, plug ins, screen protectors / cases and what not.