Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Usefull

This is an amazing product. I have been using this for about half a year now and I am going to keep using it.Design:-Has many different levels to adjust the height-Has two small detachable trays on the sides to put stuff such as your phone on there to charge-Made of hard plastic, and feels solid-Isn't wobbly or easy to slide on a flat desk-There's a bit of space under this riser so that you can fit items such as a calculator, or sticky notes.-It's fairly lightweight-Some cable management grooves in the back.Portability(doesn't matter too much for me since I usually just leave it on my desk):-Not portable, even with a suitcase-It comes in a box form and it takes up a lot of space-Does not take up a whole lot of spaceOverall, This is a good product for the price. I now fixed my slouching from before and now my neck doesn't hurt when I use my laptop.I would recommend this to people who don't need to take it with them, have a decent amount of space, and like different levels of height.