Pros: This tail-post is of high quality, quickly and easily assembled, easily maneuvered on a concrete floor slab, perfectly fits 8 x 16 blocks with enough space to get your fingers in to pull the blocks back out. Height adjusts in seconds by use of extension posts. The ability to remove the concrete blocks (or whatever other weight you use) allows portability (i.e. it weighs less than 50 lbs unloaded and can be lifted into your car or pickup truck), unlike another tail post sold at Spruce which requires you to pour concrete into a wheeled tub. Cons: No fine adjust so you will have to get as close as possible to the hookup point and then either lean down on the tail of your aircraft or use your wing jacks to lift the tail up enough to allow the tail post to be slid underneath. Overall, FANTASTIC value, durability and functionality at an EXCELLENT price.