I've ridden a few conventional trikes, most recently a first gen Victory V-92 conversion last month. I have yet to sample anything smaller than 1500cc in trike form nor have I tried independent rear suspension either, but from what I have gleaned so far is they can really fight you in a curve.
You have to keep your inside arm straight and really force the handlebars into a turn. Forget what you know about counter-steering, or what you think you might know for that matter. You push right to go left, with emphasis on the word "PUSH". I can only imagine IRS makes this even more so since it will lean the wrong way like a car. The trade off of course will be a smoother ride in straight lines...IRS will absorb the bumps better than a solid rear axle where the entire rear end is doing the work instead of one wheel.
I'm anxious to try a light weight trike, just to see how the reduced weight/momentum eases the handlebar turning work.
Check your state riding regulations! In Ohio you can't ride a trike unless you have "Trike" endorsement on your license. So, at least here, not anyone can just jump on and ride one.
Yep, different states have different trike regulations. Some require helmets, others do not. Some require an M endorsement, others allow the standard automotive endorsement, and as mentioned there are those who require a trike endorsement. Some states register them as bikes, some as cars...so beware of the potential for smog checks on the latter.