Machine does have a cooling fan. Only uses DVD+Rs and will not record to CDs. Has 3 hour recording mode (can be hacked see other threads) to remove macrovision.
I have one and have not experienced the dreaded jitters. The green tinge problem much improved since last firmware update.
One minor issue with Liteons is that it uses DVD+VR format for recording which differs slightly from DVD-Video format. Sometimes disks from Liton will not play on all other DVD players (most but not all are ok). I usually record on +RWs and use PC to backup to +Rs (in this case, the +Rs are then in DVD+Video format).
Reliability is a bit suspect on Liteons (I had one fail - a 5001 and had the 5002 as a replacement). However, as they are only around Â£120 - not a major cost given you can hack the machine
Overall, not a bad PC for price, but like all DVD recorders, you need to find good media that works with them (my best experience is Verbatim 2.4x DVD+RWs.