Things I liked: Contains all the parts needed and a nice step by guide with a diagram for an easy install.
Things I would have changed: Nothing.
What others should know: After 14 years of being staged beside my garage door ready for the next wave of pigeon attacks. There is no climate control in my Arizona garage so it's a wonder the seals lasted as long as they did. It took about 30 minutes to install and my old Benjamin-Sheridan 397pa is ready for another 14 years.