I spent about a week researching memory foam mattress toppers and decided on this one.  When it arrived, I took it out of the packaging and watched as it adjusted to the air.  This is a very nice mattress topper.  It has a special textured bottom that prevents it from slipping around once installed.  The  four elastic straps on each side of the topper keep it nice and firm around the mattress.  The material on the top and sides of the topper appears to be high end.  I am very pleased with how it fits my queen side bed.  It makes the bed so much more comfortable.  This was a wonderful purchase, and I would recommend it to anyone looking for a high quality yet reasonably priced mattress topper.  Highly recommended.