I've got one of these beasts and it's quite the showpiece, but since my Laserdisc collection has been relegated to my closet, I just haven't had much need to hook it up. I really got a charge out of playing Sega CD games on it at first, and Triad Stone was entertaining for a while (my only LD game), but the thing is so massive and slow that it's more of a chore than anything else.
After 10+ years of searching for the TG pac (without resorting to you-know-what, of course), I've given up completely. I've got a Karaoke pac but I've never hooked it up to see what it does. This thread just reminded me about the ol' behemoth... it might be time to put her out to pasture...
Congrats on the purchase, BigusSchmuck! It's always a nice feeling to get your hands on that new toy you've had your eye on!