I let my routine slip for about 18 months & now I have some significant work to do to get back in the shape I was in! Plus a few pounds to lose.
For strength training, I like free weights best. I love dumbbells, for my arms & shoulders. When I first started working out I discovered that my left side was significantly weaker than my right side, so when I walked by the weight room, I'd stop & do a few reps on my left side. I'm all even now! ;) We also have a nice bench, plate weights & a few other pieces of weight lifting gear.
I have never used a Bowflex, so I can't give any feedback on that. I do know this, from having purchased many pieces of workout gear that I never used: trying something out for 5 minutes is not a good test. Five minutes on a glider did not give an accurate portrayal of how frickin' uncomfortable that motion was when continued for 30 minutes! So if you go with the Bowflex, try to find a club or a close friend where you can use it for an entire workout or two.
And finally, if you go with free weights, these little gems are worth every penney! I paid $20 for a set of two & bought two sets.
Plate Mates They are 1.25 pound weights that anchor to your weight plates or dumbbells with magnets. I've never had one fall off! This way, instead of purchasing 10, 12, 15, 17 & 20 pound dumbbell sets, I purchased 10, 15 & 20.
Let us know what you decide.