I guess it's down to the fact they only have 64mb. as long as you stay on track it's ok, but it's very slow recalculating new routes. I would opt for Primo 2.0, but it's a bit too heavy for the device. After playing with different satnav programs, I found the IGO's to be the easiest to set up/use so have been playing with them for some time now. I can now unlock the PMD-B100 and the pmd-B200 v2.0 (no luck in trying to unlock the first versions off the 200). Hi all, I am still very happy with my GPS on paper, but recently I got hold of over 15 Alpine blackbird GPS' (recovered from a pallet that was going to a recycler, I believe some Alpine shop emptied it's closets) off which 12 are still working So as any guy would do, I started playing with them :D.