Hi Chris,
I've used Scientific Anglers' Air Cel and Mastery floaters but found they suffered with memory problems. Last year I 'invested' in a Lee Wulff TT, and I am glad I did. The line casts well, has no memory problems and comes in an olive colour which keeps the other anglers guessing.
My only gripe is that when fishing a team of buzzers on the drift, the tip section tends to sink after a while. I suspect that this is because the last few feet of the line is finer and therefore less buoyant than others, but it improves presentation - an acceptable trade-off in my opinion. Great when fishing single dries.
I have heard that the line doesn't wear too well, but mine is still fine after 12 months use, applying a placticiser after each time it gets a wetting. At the price, they are well worth looking after!