Which sat nat is worth buying? As the 520 can have its mapping updated to include Advanced Lane Guidance and IQ Routing which the 530 already has as standard.
I've got the 530T and it's fine. It's also pretty unused now, since I have satnav in the R32. I used to have a 720 that was stolen, that seemed to be a bit quicker, but it's still a very good satnav (speed camera database is very useful!)