I use Wayfinder all the time, before it I used Tom Tom on a Palm TX. I can't differentiate between them in speed of operation or mapping accuracy - neither is exactly 100% in the mapping area but speedwise both work plenty fast enough for turn by turn navigation in London.

And the price for a 3 year license doesn't strike me as bad. Updating Tom Tom's maps was a lot more expensive.

Wayfinder's not perfect - if only there was a British female voice instead of plummy Christopher - but it's as good as any other software on a non-dedicated platform.

I have happy memories of Tom Tom begging me to 'turn left immediately' while I was driving through the Loire Valley. I didn't because on my immediate left was the 200 metre wide River Loire - and the nearest bridge was at least 10km ahead of me.