I've used Neotech for the last 4 or so years and like them. I don't buy the ones with the plastic clips. I get the plastic coated metal. About a year ago I saw got their new model. Looks more like a regular strap,( don't know if that's what was refered to as a "classic" strap) but still has the weight reduction system. I like it. Works on my straight soprano, alto, tenor and bari. I know some people don't like the Neotech because they say they slip. I've never noticed that problem.
The regular Neotech has a wider (2 1/4" at its widest point where it sits at the back of your neck) piece of tapered (1 3/4" at the narrowest point where the nylon straps attach on either side) neoprean which the black nylon straps attach to. The edges of the neoprean are not sewn, just cut.
The newer strap I have of theirs still has neoprean, but is only 2" wide, and is the same width all the way until the nylon straps attach. The edges of it are sewn, and overall the finishing touches are nicer.