ASW 20 was ahead of it's time and in reality belongs to same generation as Ventus/LS6 (except that final bit of wing loading). Handling is pleasant, more so than Ventus, and it is easiest glider to land on a short field. You get spare parts and technical assistance from factory without annual fees. It will drop wing if stalled in thermal, just like every single glider this old (especially with aft CG). Push stick forward and you are flying again. All Wortmann FX170-profiled gliders are older generation performance-wise. If it rains or you get bugs on leading edge, you fall out of sky like an anvil. No doubt most of them can be pleasant to fly and perform ok, but they are not on the same level as '20.