Don't waste your money if you expect them to be "self tailing". why? Because there's no stripper arm to peel off the line as you wind it in. Also, for even a foot or so of "self tailing" the drum must be fully wrapped so the underneath, ribbed part of the rings can grab the line. This is time consuming and requires two hands..... so what's the point? Nope... won't work otherwise.
However, if you want to use them as a cleat, or do minor tweaks, they can provide a benefit to halyard winches...but with your primary sheet winches.... no, no, no... not good..imho they actually slow down or inconvenience the operator. Save the $100 for other projects. There's no short cuts here. Enjoy your new ST winches... a very good investment.