Phone or email contact?

Hi,
Back in June you posted this about Harry's Lap Timer:
"I love my HLT/Dual electronics GPS combo. I don't like having HLT in sight when lapping, so it sits (not charging) in my center console. You'd be surprised by how much longer the iphone's battery lasts when the internal GPS isn't being used by HLT."

Are you still happy with it? I'm strongly thinking of going this route. I have HLT, I just need to get the Dual BT GPS module. I have found HLT w/o the external GPS module to be very unreliable.

Thanks
-Mike