I switched to TT6 from iGuidance, having also used Destinator 3 and Mapopolis.   The ability to make my own POIs was the reason I went to TT6.  I run it completely off the SD card in my Dell Axim to clear more program memory.  It takes a few more seconds to load but it runs smoothly.  TT6 has made a few routing errors so far, but in general it's a great package.

I do have one gripe though, and it may be due to my newness with TT6.  When I'm moving, I like to zoom the moving screen map in or out so as to see a different area picture of my route.  TT6 will zoom in or out by my tapping on the  +/-  screen buttons, but after 10 seconds or so it automatically zooms back to the original magnification it had when I hit the +/- buttons.  Is there a way I can set up TT6 to keep the zoom settings I choose until I change them?