I had a mini-abdominoplasty (tummy tuck) about 10 years ago. Definitely worth it. Tummy is flat and most of stretch marks are gone. Scar is below even low cut jeans/bikini.
My only complaint is there is 2 small flaps of skin on the left and right side of my scar that hang over slightly. The surgeon told me this was a possibility. They don't show under clothing and are very minor.