There aren’t detailed instructions, but there are diagrams, so it was fairly easy to put together. My husband and I completed it in about an hour. All the parts were listed, and easy to identify. It looks sturdy and hopefully will withstand any strong winds that might come our way. We are going to purchase a heat lamp when the weather gets colder. So far we are very pleased with our purchase.
1/22/22 Update
Now that this has been in use for a couple of months, I felt like I should add an update. We have had several days of strong winds in Texas (50 mph gusts), and the greenhouse has held firm- no problems! Also, there have been several different nights where the temperature has dipped into the low 20’s. We have a thermometer inside, and a heat lamp, and the lowest lowest measured temperature has been 31 degrees. The plants are thriving. This has been one of the best purchases we have ever made!