I purchased this converter to store my video tape collection onto DVD for future use. I use a modest Toshiba satellite laptop with twin 1.5 Ghz processors and 2Gbyte ram and Vista premium. I found the printed instructions OK but somewhat dated - referring to old Windows operating systems only. However I successfully navigated my way through the instructions to load up the USB driver. I then went to Startech's website and downloaded the latest drivers - and loaded these. I will never know whether the originals on the enclosed CD would have been OK, but took advice/comments found on Amazon.com site for this product and loaded drivers from manufacturers website. I then loaded the GrabBee application from the CD - straightforward enough. I ignored the other bundled Video software on another CD in the package.
So to use - connected to composite video and audio from my Freeview converter, started GrabBee and immediately got image in preview window. All I then needed to do was to select composite video (rather than S video default)and video was fine. My experiments on video grabbing through USB showed no dropped frames at all on 640x480 with computer operating normally (internet via broadband on, e mail running, virus checking/firewalls all on).I increased the frame to maximum of 720x576 and got a dropped frame every 30 secs or so. However I am confident that when I switch off wifi and internet ( and possibly temporarily switch off virus checking), set power options to max power, and have no other applications running this would be OK.
The video and audio quality is excellent - and I use MPEG2 option with Windows Vista bundled software to edit, add titles etc before burning to DVD. All in all very pleased so far, and product looks pretty robust.