I have been totally sold on the Insta Trike Conversion. I have a complete article with pictures at this link.
If you have been reading other posts you will see that I have been riding over some of the twistiest roads in So Cal, with no problems, as the others on this site, will attest too.
I can take pictures, look around and my wife can move around too, but I stay straight.
I chose this over the regular permanant trike kit, because I can remove it when I want to, and it rides softer than a conventional trike does. It is wider and much less expensive too.
I have never been able tip it over, no matter how hard I try.
In a sharp turn the inside wheel will lift just a little, because the outside wheel compresses on the torsion bar, (designed to work that way) but there are still 3 wheels on the ground!
Once you get used to it, you will be quite at ease and find it a little hot rod.
There are 2 sizes of wheels for them, and you can send for a free dvd from their website. I like mine alot...I mean really.
Here's the link to the website and you can see pictures of all the bikes they make them for.
So Ride easy and safe.