This is a nice small greenhouse (6' x 8') and it works well. The door can be locked (you supply the actual lock) and there are two vent windows to let out some of the heat when needed. It is only early spring and the greenhouse is already 15-20 degrees F above the outdoor temp. We located our greenhouse to get 6-7 hours a day of full sun - we want some shade in the late afternoon to evening time and that works for us. We start our garden from seeds which we germinate inside and then move to the greenhouse about this time of year. Once the plants are growing well, we move most of them to the outdoor garden keeping a few plants like tomatoes and peppers in the greenhouse for backup. All in all, a nice size for the two of us. My one suggestion is to go online and find a build video as the diagrams that come with the greenhouse could be more descriptive.