I purchased one of these last spring to keep the squirrels from digging up my seedlings and it worked well.  Once it got warm enough I took off the plastic cover and used deer mesh to cover it instead.  I took it apart in the fall and stored it in the greenhouse and have just put it out again.  This is the second one I have ordered.  The plastic did separate from the zipper in a couple of places on the original one but that was mostly my fault.