I give it a 3 star (why do what I see above are all 5 stars?). I'm sorry to say that at this point I'm not really too impressed with the 2B. I've been using the ET-312 for a few years and find that it has more variety of sensations and is far easier to use than your 2B. I'm still exploring your unit so my opinion still may change, but for the time being I'm using my ET-312 most of my play.
The other problem associated with your 2B is the cost factor. By the time I paid shipping from England, delivery charge from DHL delivery, and Customs fees my final bill was around $500 - much more than I had expected from your web site. Sorry to be negative, but I'm just not impressed at this point. Would I recommend friends to purchase the 2B? Probably not.
On the positive side, I gave a friend information on your bi-polar tit clamps. Both he and I have used them and find them quite good.
[ED: We're sorry to hear you're not entirely satisfied with your purchase, but we appreciate that you're not giving up on the 2B yet, and we appreciate your feedback. It might take a while to get used to after using another unit for so long. The 2B and ET-312 are different units, and each has a different style of play.
One of the benefits of the 2B is its upgrade-ability, and we are always working on improving its programs. The cost issue with US shipping is something we're working on. At the moment we ship directly from the UK, and unfortunately customs will occasionally attach their fees. We are working towards having distributers based in the US.]