3 VL Reefers, 7 PS1s and a mooing cow car.... This was pretty ridiculous. I spared everyone the hotbox cars.
Here my opinions:
These cars are neat. The vision ones seem to be a little more responsive to train motion (probably because of train link), the PS1 cars are nice too.
They have the worst/weakest couplers in recent memory - the electronics make them heavy cars, stringing a bunch together caused major problems, particularly when other non-sound cars were mixed in. I think I'm going to convert them all to kadees so they hold. Worst of all was the completely unnecessary electrocouplers on the VL cars.
The effect is actually better with non-sound cars between sound cars. Especially at lower speeds, it sounds like a rumbling wreck going down the track with too many noise cars next to each other.
I would totally buy more of these, particularly if the sounds that came out of them weren't identical to whats out there now.
Disclaimer: They're not all my cars, its a pool from several club members.