I bought a go cruise, but I really don't like how it blocks my hand on the grip. I always hold my grip right up on the very inside, so it's uncomfortable for street riding.
However, long rides? I'll find out tonight on my way back from palmdale. I normally ride a LOT, but I also ride through traffic, so I haven't wanted to use it on my commute.
I'd still rather get another cruise control though, something thats not so...invasive