I have the Garmin Moble 10 package I use with my Treo 700p. If I had to use this daily, I would definitely get a standalone unit. My wife's cheap Garmin i5 easily outperforms this. Now, for my occasional out-of-town usem it's fine. But performance leaves much to be desired.

Windows Mobile may be better performing than Palm OS (this package is also WM compatible), and the TomTom may be a little better than the Garmin, but the old adage of the compromises that you accept to combine multiple functions in one device holds true here.