I got my Lumo Lift as a Christmas gift last year and I absolutely love it. I work in tech, so naturally I sit at a computer for 8-10 hours a day. Wearing Lumo Lift at work is the perfect reminder to sit up straight. No more slouching for me.
Tip: I keep my charger at my desk and just leave the Lift there overnight. This keeps me from leaving it on my shirt or misplacing it at home.
Can't recommend this little device enough.
Bottom Line: Yes, I would recommend this to a friend