I've had my Lezyne Super GPS for about 3 weeks now, I'm pretty happy with it. Battery life was the deciding factor for me.

I use a Wahoo Tickr HR monitor and the Wahoo Blue SC speed/cadence sensor. I'm finding I have to tell the Lezyne that my wheel is a smaller size than it actually is -- it doesn't seem to matter when I upload the ride; but when I'm actually on the bike it's telling me I'm faster than I really am. Other than that no issues.