I've used all of the models for many months. My favorite is the MGX. Second choice is the Maximus. I think Aneros could create the "better than the best" if they did a few things. (1)slightly enlarge the MGX, (2)cover the insertable portion with a very thin "sensaskin" material that is used on the pricier dildots and (3)devise a way to build an eraser sized metal ball (under the sensaskin)that would be battery operated and move up and down to massage the prostate. I've tried almost every vibrator on the market and I just don't like the way they feel. However, I love all the new shiatsu massage based products. If the MGX had something resembling that sensation they would then, in my opinion, have a miracle to sell.