edit: got price wrong, see below comment.
I’m not a big fan of these to be honest. They try to pose as a quick fix, but those guys that model it probably don’t use it. They use free weights, watch their diet and have been doing so for years and years.
Twenty minutes a day of only lifting is probably possible at the beginner level, but to get gains later you will not only need to lift more often with more reps and such, you will NOT get big using bowflex. (I’m not interested in turning this into a debate, but I believe this with the same conviction I’d say “you need oxygen to live”)
The other thing, bowflex is like 1500 dollars. I built my own gym with a lot less than 1500 dollars. (probably half that). It is much more utilitarian as the bowflex. For those interested, an olympic bar with enough weights for me , power-rack, muti-bench, and an adjustable dumbell set only ran me about 800 bucks. And I bought them all at Dicks sporting goods. If I had bought them on craigslist or shopped around I could have gotten them cheaper. (this price also includes mats and extra weights for the adjustable dumbells)
edit: gonna leave the price alone, but apparently 900 is the usual price these days. When I bought my stuff, and almost bought a bowflex, it was much more (though like 6 years ago). However, weights themselves are probably much cheaper too and the utility is greater. (they do take up a little bit more room though, lol.