does anything else work to tighten your southern region?
and how fast does it work? just curious.

You could try getting some ben-wa balls or heavy dildos and exercise those muscles by trying to keep the objects in your vagina. Never used it myself but Google for "Kegelcisor" and you'll see the kind of dildo I mean.

KegelMaster 2000 is great. Kegels weren't really meant to be done unassisted, you need something to provide resistance. Kegel Master will do it and lets you set 15 levels to continue to keep challenging those muscles. I'm just past half way on the resitance levels and it takes a bit of hand effort to close the device but my **ssy can handle it! If you have trouble with sudden urgency, frequency or incontinence it will make a big a difference fairly quickly.
Bruce Willis' porn star gf says it's the greatest sexual aid ever. To paraphrase her, a tight woman makes every man feel big.