Don't you all park your bike in 1st gear so it can't roll forward or back? I wouldn't leave mine in neutral just so a remote-start gadget would work, especially if the parking spot wasn't utterly flat and level.
Also, I'd imagine this would work much better on a FI bike that handles cold-starts automatically. On our bikes, we'd have to leave the choke full-on when we left the bike if we wanted a remote-start to work reliably.