Anyone using Dynolycious or any other iphone data loggers?

[BeirBrennerE30]

I have used dynolicious. Failrly accurate once you figure out how to mount it. Your iphone needs to be solidly mounted in the car somewhere. If it vibrates or shakes at all you will screw up your data. i.e. Dont try sitting on it, sticking it in your sun visor, etc. Oh yeah and dont forget to calibrate it!

[equate975]

Yeah I have dynolicious. I bought it, but have yet to use it. You need a long road that you can max out 1, 2, and 3 on. Just haven't had a good opportunity to do it.

[bimmers4life]

So I saw this cool looking app for the iphone called Dynolycious. Is anyone on here using this or one of the other data logging apps for the iphone? I'm picking up an iphone this week and though one of these might be fun to mess around with. Just wondering if anyone has played around with any of them.