Hmmm should I invest in STS? I've been away from Cathe for awhile, and am looking to jump start my fitness but I don't often have over an hour to devote to my workout. Are they long workouts? And where do I buy the tower if I need it? I tried the new Firm Express DVDs but only ended up losing one inch in a month and hurting my knees .... I am 49, short and weigh about 114 lbs. ( Will weigh in on Saturday at WW ) Help!