Personally, I like and recommend Quasar MD PLUS, but I must admit that if I had paid (the hefty) full price for the device, I would be disappointed that my results are not miraculous. The improvements I have seen are real, but they are not jaw-dropping. As with many beauty devices, I feel like I have to use this regularly to try to maintain results, especially on expression lines. There are other options; the Quasar MD PLUS has a treatment head of 1.94 inches in diameter with 5 mm LEDs, whereas the Baby Quasar PLUS has a treatment head of 1.44 inches in diameter with 3mm LEDs. If you are willing to devote a little extra time, Baby Quasar PLUS will deliver the same results as the more expensive model.
Bottom Line: This device, although not as miraculous for me as I may have hoped, does make a difference, possibly shaving off 3-4 years my appearance when I use it regularly. I personally have not had any particular issues with sensitivity or inflammation from using it, but I do recommend caution on sensitive skin as well as always doing spot tests as advised in the directions.