My SO is taking me to the bike shop he rides for (not my usual one) to try rollers before I shell out the money on the E Motion ones. He is telling me that rollers are rollers are rollers, the emotion ones will just keep me from falling off. While this seems to be a very nice addition to the setup, he maintains that I should just "ride straight" and swears that I am a good enough rider not to crash. Since I have managed to crush half my landscape by falling into the bushes at the end of my rides (I have a really steep driveway at the end of a down hill and always forget to gear down) I find this doubtful, but he's the professional.
Yeah, sure...but you can't (reasonably safely) stand on the pedals and sprint on regular rollers like you can with the e-motions.
Of course, he'd likely ask: Is that alone worth the price of admission???