I have been using Mama Mio products for over a year, and am new to Birchbox, really wish they carried more Mama Mio.
I love Boob Tube, and have purchased several bottles over the last year. It definitely delivers on the skin tone promise - I think my neck and chest look younger, firmer, softer after just a couple of days.
I'm 30 but lost a lot of weight last year and start panicking at the sagging, which is when I found Mama Mio.
I love Boob Tube but have to say that it is good, not amazing, without putting on Skin Tight first. I would give it 5 stars, but I don't see it as a stand-alone product.
I notice *major* perking up and tightening after just a week when I used this in combination with Skin Tight (also from Mama Mio). When I put Skin Tight on first, then Boob Tube, slack skin on my neck and chest definitely firmed up and looked way, way younger. I used it every night for a few weeks, and the results stayed when I got lazy. Now I only put on a couple of times a week, and I'm still really happy with it.