If you have to keep your trailer at a storage facility periodically, you'll really love them when you find you can't get into your trailer because the trailer next to you is too close, and they can't be put down. Oops, now you have to hook up, take off the wheel covers, remove the wheel chocks, raise the landing gear, and pull the trailer out a few feet so you can get in, then reverse it all when finished inside. How wonderfully convenient.