Tango was my absolute fave until I tried the Touch last week.
The Touch has the same vibes as the Tango but is an absolute joy to hold compared the Tango. I love the feel of the silicone and find it soaks up a lot of the vibes - in a good way.
It's not as pinpoint as the Tango so I find I have to move it around to find the most effective place to let it do its magic.
That's a good thing - and a bad thing.
The bad being that my orgasm takes a little longer (I masturbate to help me sleep or relieve pain so often just want to get off ASAP), but the good is it's different. It's not a fierce as a Tango induced orgasm - which would often "over-cook" me, leaving me having gone over the edge a bit too far if you see what I mean.
I think that's what you mean when you say your wave disappears.
The good is that I can control it a bit better, I'm not there so fast so my orgasm lasts longer and is more satisfying.
I have the Zumio and it is VERY pinpoint. It would be way too painful, even on the lowest setting for me to "warm up" the way they describe on their website. It's very effective, though, when I've found my sweet spot.
One more thing, though. Have you tried one of the suction toys? I had a Womanizer which gave me the best orgasm ever, but it rattled itself to near death so I returned it and replaced it with a Clitorizer (no longer sold). This also hits the spot but the Womanizer had a larger head which I found easier to use, despite my tiny clit.
I've also tried the Sona and am a bit (well, a LOT) disappointed. I find the waves too harsh and even as someone who can orgasm easily and under a minute with a Tango, was fiddling around trying to get it in the "right" position for me.
I bought it on the strength of a review that was written by a lady with MS, and as I have TM (a similar neurological disease), and can definitely feel a difference with the way my body feels things, I thought that it would be ideal for me due to the advertised deep waves.
I've been looking at a new Womanizer or Satisfyer instead and have noticed the new Satisfyers on the site, so when I have a few more quid to my name, I will definitely be picking one up.
In general, I think the suction vibes (judging by the reviews and my own experience), are the most satisfying and least aggressive vibrators out there that will not only get you on that wave, but riding it several times over.
There are a few of us disabled ladies on here, and I don't know if they feel the same panic as me when I think of what I could lose when my condition worsens. I'll be devastated to lose the ability to use my body's own relaxation and pain-relief system.
So hop back on and ask those questions - I think reviews might be too generalised sometimes - and then, when you think you've found something, spend some well-earned on one of life's most important pleasures.
Hope you enjoy what you get - immensely.