I suppose the great thing with an aero tow as opposed to a winch is that the tug can move with the glider, if the tug pilot detects the lockout starting, whereas of course with a winch, it's fully down to the glider pilot to keep on a stable course.
I did my winch conversion on paragliders at Kemble airfield & I have to say it was one of the scariest sessions I ever took. The rate of climb is massive & the aoa so high that we were told that we could use no more than an inch of brake travel to control the glider lest we span & instead to use weight shift to stay on the tow line correctly. Great fun though & it beats walking up hills anyday.