i bought a five pound kettlebell and a video to go with it. it's pretty fun. i have resistance bands. i like them. i personally don't want to bulk up so i think they are great and have to limit my usage because i build muscle so quickly with them. i stick to light weights though. i only have three pound free weights. i just read an article about how more reps at a lighter weight vs. heavier weights and less reps builds more strength though. (the heavier reps) i should probably try for some heavier weights to build better strength. I am just afraid to bulk up.