I have the Astrale 8 as well, no problems here. I got it for $29.99 on sale at Performance. It's great, but I'm considering upgrading to the Cateye Double Wireless. Not for any particular reason, I just like being able to see everything all on one screen and not having to scroll through everything. But the Double Wireless is SOOOO expensive.

Can't go wrong with the Astrale, IMHO. Never had any problems with it.