I do Legs & Glutes all the time, but have never done the Timesaver lower body workout. I reviewed the notes I made on the TS version, when I previewed it, and I think it may actually be more difficult that Legs & Glutes - and is about the same length. If you can do the TS lower body workout, you can, without a doubt, do the full Legs & Glutes.
Take care,
Sandra