Ortovox Top Rider

Does anyone have any experience with the Ortovox Top Rider:
http://www.ortovox.com/en/produkte/d...p?DADCODE=1214

If you own one, are you satisfied or dissatisfied?
If you considered buying one but didn't, why?

My intended use is lift serviced offpiste skiing where there may be a
risk of avalanche. For longer excursions I will use a larger backpack.
Hence I don't need room for everything, only shovel/probe, some water
and food, and perhaps a few items of clothing. And I really like the
idea of the integrated back protection, today I use a separate back
protector.

Thanks for any advice.
Arne
Norway