Hey, this is great. I'm not a gym rat. I do like fitness. I come from a long line of people with chicken neck. I'm closing in on 50. So I gave this a try. I'm not a tall human and I don't have a thick neck, petite is how I'm described. jazbroz jaw exerciser really works your whole head, jaw, and neck. I didn't have breathing issues at night, but now I breathe better when lying down. My neck is stronger (great because I wear a helmet & I like my neck strength). My jaw line is tighter. My neck and under my chin is firmer (but honestly, at my age, it's going to take a longer timeline than a month to really show improvement...I'm old and female). If you are looking to improve the structure under your skin, I highly recommend this. Full disclosure, it makes me dry heave. If I use it while looking in the mirror, I don't dry heave as often and as I use this daily for a number of weeks, the less gag reflex I have. So weird, I don't really have a sensitive stomach and am not really prone to gagging, so that was an unexpected "feature." If this happens to you, think of it as a bonus core workout and keep on truckin'.