Yeah, I find place search is very handy for setting the Sat Nav with your voice, because is searches Google, using Google's voice dictation engine, you can just say the place name eg "Online search John Lewis in Leeds" , and it just works straight away, it finds the place almost instantly, even giving the phone number to just make a call to them if you want, or you can then start navigation with one confirmation click. Trying to use normal MMI onboard voice search by dictating the postcode or address etc is a bit of a nightmare and very hit and miss.
For 180 a year though...I think I'd be happy enough just pulling over and searching, than typing the address from my phone!