In negative points I agree with others, fasteners of the cover can easily be eaten by rabbits. In addition, depending on the time of day, it is useless because all the shadow is cast out of the pen.
There is no grid floor, so the rabbit can dig to escape.
And finally, the manual is very well explained, though, when we find the right way for grids, installation is relatively simple on.
Finally, the pen does not seem completely stable, you only want to push a little the pen of a few centimeters, so that the roof clamps detach and that we should reuse. So do not move the cage.
In my case, the cage being for a sheltered terrace, so I had no need of the tarp or need a grid, so these defects were not an obstacle.
In conclusion, if we do not stop to the tank which is a secondary accessory than an asset, the bullpen did its job, a good solid living space for a companion.