Got one of these yesterday. As it was supplied by Orange, it came with the VoIP and one or two other applications crippled and froze no less than 3 times in the first 10 minutes of me fiddling around with it. That 10 minutes was enough to convince me it was probably worth keeping, however - on the assumption that the feezing issues were mostly down to the buggy Orange software build.
So, next step, debrand and load generic Nokia firmware, which took about 5 minutes of actual doing and about 20 of being left to downlaod a 114 megabyte file and update it to the phone. Afterwards, hey presto, no more freezing, faster GPS acquisition times, VoIP/Internet telephony options restored, set up and working and no more annoying Orange customised menu layout.
Just waiting on a decent sized memory card to arraive now in order to download as much of the mapping as I think I'll need over broadband so that the phone should never need to do so over the network at Orange's OTT data costs.
Overall, it seems like a decent enough product - should you be on Orange or Vodafone, provided you uncripple it that is.