Instruct: Classify Amazon reviews into positive or negative sentiment
Query: works as expected

It is very easy to open but very hard to close up. I tried and failed at least 20 times to close this sucker up. I watched videos online to hopefully find a key to close it up. I had someone else give it a try and he tried to close it up like 5 times before he got it to close. He then showed me how to do it and I have been able to close it myself since then. This cube is very large and the backgrounds are very nice. I have not gotten all of the wrinkles out of the background yet. I am only an amatuer photographer so the wrinkles are not a problem for me yet.