I've used it once, and I have the software on my computer. I really like it, and I'm planning on getting one as soon as I can afford it. I have never used any other dataloggers though, so I don't have a good reference point.
2005 GT Open Track Car - Steeda suspension and Stoptech's
1998 GT Open Track Car - Steeda 5-link and Brembo's
1999 Silverado - Tow Vehicle
2005 Infiniti G35 Coupe - Big, Black 19" Wheels