My wife has had the female equivalent of this (the eroscillator - but it's not G Spot specific) for years, and always has the strongest orgasms with it, so when I found out that there was a male model available I couldn't wait to get my hands on it, and thought that the (frankly very expensive cost) would be well worth it.
In summary, part of me loves this toy (my penis) and part of me doesn't (my prostate)...!
The Ooh La La comes with various attachments; the conical penis attachment is fantastic, and when you put your cock in it it produces some fantastically strong vibrations of all the sweet spots, the end result of which are some amazing (virtually hands free!) orgasms.
However, the 3 prostate massager heads (soft, medium and large) are frankly very disappointing. If you look at any other prostate toy they all feature a hooked end to reach round and put pressure on the male G Spot, and the lack of this is this toys downfall - being completely straight means that I struggled to get adequate pressure on my prostate that no amount of fantastic vibrations could overcome. Also, these heads are concave in shape, which means that if you haven't cleaned yourself out properly first it easily accumulates poo - this wouldn't happen if the heads had been solid.