It depends on your level. I was previously a mid level impact person but my osteoarthritis has curtailed that. I now do low impact with less jumping around. My preference is for tapes that allow you the flexibility to split the exercise session or do the the whole session. I have a sizable catalog but some of my favorites are: 1) Nautilus Low Impact Aerobics (an older VHS 40 min. low impact aerobics tape); 2) Leslie Sansone's Walk Slim 4 Fast Miles (a 46 min walking/low impact aerobics tape). This one is excellent because it allows you to split the work out session in terms of miles. If I'm running short on time, I do 2 miles (approximately 20 + plus mins) before work and the rest after work starting with a slight warm-up. 3) Turbo Jam (a 20 minute workout). This has great dance music and even has a sculpt (toning) session. Once your level is substantial, Gin Miller's original aerobic step tape is exceptional, but lengthy. Since tapes can be costly and I have been disappointed after buying some of them, I look for the best buys and I also check out reviews online. A quick tip. Every so often Target has exercise DVDs in their dollar section. I have picked up several tapes this way in the past. Also, Ross stores carry some exercise DVDs ranging from $3.99 to $6.99. You may not recognize the author but who cares. This way, I am able to try out different types of aerobics, including kickboxing. Hope this helps!