SALUTATIONS, I GIVE THIS MATTRESS TOPPER 4 STARS. I CHOSE THE TWIN X LARGE. EVEN THO ITS MADE NOT TO REPOSITION, IVE FOUND THAT IT DOES SHIFT SLIGHTLY. ALSO, ITS A SMIDGE NOT WIDE ENOUGH, BECAUSE I FIND THAT MAYBE AN INCH OF MATTRESS ISNT COVERED ON THE LEFT  WHEN I REPOSITION IT, IT SEEMS THE THE RIGHT ISSUE HAS THE SAME ISSUE. OTHER THAN THAT I LIKE THE TOPPER. ITS VERY SOFT AND CUSHIONY. I SUFFER FROM BACK AND BODY PAIN, THIS TOPPER HAS ELIMINATED SOME OF THE PAIN. I WAS AFRAID THAT IT WOULD BE TO SUPPORTIVE AND I WOULD HAVE A HARD TIME TURNING ON MY SIDE OR BACK AND GETTING UP. MY PAIN DOES MAKE IT HARDER TO THOSE THINGS, BUT THIS TOPPER DOESNT MAKE MY MOVEABILITY SO DIFFICULT, WHERE I DONT WANT TO USE IT.  THE LONGER I USE IT, PERHAPS MY PAIN WILL DECREASE. YES,I RECOMMEND BUYING THE MEMORY FOAM MATTRESS TOPPER. THANK U.