Navigator 8 has truck limitations (height, length, axle and overall weight) built into it AND allows you to import your own POIs.
It's available for Windows XP/Vista, Mobile 5 for PDAs and Smartphones and ME for dedicated devices. They're available with 3", 4.3" and I'm currently testing a 7" version.
I've just done 450 miles testing it along and it performed admirably although, like most sat navs, it was keen to cut corners. The major difference being that you knew you could get though!
I love the lane lollipops showing which lane you should be in as you approach junctions, If I'm being really nitpicky I'd prefer to see them earlier than they're currently displayed.
Being a comparatively small company Mapfactor are able to take suggestions on board and come up with enhancements in very short order.
You can see the whole of the Navigator range on
Directions Website but as I'm still an authorised reseller I can offer a 10% discount on their products.
Regards
Doug