Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hardware is great, software is bad.

I have been using Navman 3450 since they came out. I upgraded my software to SP2, but the maps have major issues. Finding addresses that are located on routes is almost impossible. The problem is that most stores/shopping centers have a route address. There is no option of avoiding a specific road or highway. The worst part (possibly fixed now) is that this unit will tell me to do two u-turns one right after the other for no apparent reason. It made me do two u-turns while going from NYC to Boston on 95... I like the hardware, and if I could get it to work with other software - I would be fine with it. But the Navman software is the weak point. I understand that a new version is being releases... except they want to charge $150 for the upgrade.