Well for the one who says that DVD-RAM can be reused more times than the other formats , I've read that DVD+RW and the DVD-RW too can be reused something like 100 000 times...so i'm not sure you'll ever live long enough to be able to say which one is the best regardind this issue !
So THIS is not a decisive point i think.
I have been using a Phillips DVDR 880 for almost 1 year now and what i can say already is that along with the Minidisc technology when it came out, it has to be one of the only 2 products that changed my life (i think the next one will be the Tivo receivers) .
I had completely transfered all my VHS into DVDs that makes over 100 DVD, each having 4 hours of good quality recording.
The DVD R itself is a pretty easy device to use, the phillips allows U to do tons of editing with your Discs (like selecting one small picture to represent each video, title your videos, divide a video into several smaller parts each one having its own picture etc...).
I know about the divviding thing that not all the other formats can let U do that easily !
About the compatibility, I read in an internet study that the DVD-RAM recorded DVD's were compatibles with like 90 % of the DVD players tested whereas the DVD+R were compatible with like 86 % so it's not a big difference.
From my experience i used to put my DVDs in one of my friends DVD player (which is not a phillips one) and it works fine. The first time , if that doesn't work for some reasons , here is a tip that worked for me:
if your DVD's don't work at your friends' house, put the DVD into the player and press 1 with remote in order to close the door of the device. That's it it should work perfectly.
So the Phillips is a very good purchase (and now there are some new models with even more fonctions and cheaper). The only bug that i encountered in 1 whole year was some time the DVD recorder just doesn't react no more, neither to the remote control nor the buttons on the face. So that means that if for instance you were watching some DVDs , for some seconds (1 or 2 minute big max) you won't be able to stop , pause, or even turn the recorder off...
It happened maybe 5 or six times to me...but that is not a major bug as it resolves within the minute.
If you need some more information go there:
(sorry wasn't allowed to put the entire link as i'm a newbie !)