My brother bought a BowFlex before he went off to college. DON'T waste your money. It's alright (still sitting in his room), but the cost/benefit ratio is way off.
You will be MUCH MUCH better served by a DECENT set of exercise videos (none of the "booty boot camp" or "salsa yourself slim" BS
) and a bunch of Walmart/garage-sale dumbbells.
Because I'm familiar with them, I'd recommend (don't laugh) the Power 90 or P90X videos. There's tons of other good (read: not-a-scam) stuff out there, just pick one that has good reviews online and looks like you could tolerate doing it. Just don't fall for the "It's easy!!!" and "Just a few minutes a day/week!!!" videos. Anything that says that probably isn't worth getting.
I've been working at getting in better shape the last few months and the rule of thumb I used was to look for a routine that seemed at least as hard as a typically high school
insert sport here practice, and just as often. That may not be what you need/want but it's worked well for me.
Just don't get the BowFlex.
EDIT: Rereading your post I see you did specify "not heavy" so my recommendation of P90X and my "HS sport" standard are definitely overkill. All the other stuff still applies, though. Power 90 may still be too much, but don't be afraid to consider it. Just don't fall for any "special equipment" sales pitches. The basics (dumbbells, pull up bar, mat, etc) are all you need and fit into the same space as a Bowflex, anyway.
Getting the equipment is fine and easy, it's sticking to a routine that's the problem. Trust me, I'm speaking from experience.
At least with videos you've got something you can just pop in and DO. That way a lot of stuff is already figured out for you, like what exercises you should be doing.
Most people seem to go to the gym and not do much. Videos at least give you something ready-made to follow.