Hi folks,
I've had 'em all - an indash unit, a cassette adapter, a changer mounted in the trunk, and an FM modulator.
Rankings:
1. Best by far was the in-dash unit. It was easy to change discs, no cables, etc. Nice if you can get it.
2. Second-best was the changer. It was pretty annoying because I'd forget to change discs for weeks on end, so the same 6 discs were playing over and over, but it was a lot more convenient than either #3 or #4. With a changer inside the car (in a center console or other reachable area) it would definitely be great.
3. The cassette adapter was not really that bad, especially if you are running the portable MD unit on battery power (so you don't have to deal with the power cable, just the cassette cable).
4. Belkin FM modulator - by far the worst of these options. If you have lots of room in the dash (in a tray or whatever) for the portable and the modulator and the connector cable, and if you have the dexterity to fiddle with both radio units each time your "unused station" suddenly becomes a "real station," then this might be better.
I am hesitant to invest in Hi-MD - I don't feel that it will be that much of an improvement over MDLP - so I am saving up for an indash MDLP unit for my current car instead of waiting for a Hi-MD unit.
Donna