I read all the reviews that pointed out the problem of the floor being velcro attached instead of zipped.  But there were enough good reviews that I purchased it anyway.  Was shocked that the velcro tabs on the floor attachment  were very small and far apart.  There was no way that it would stay in place with most medium or large dogs.  I have supplemented the velcro with packaging tape.  We will see if that works.  It is amazing to me that the manufacturer diminished the overall quality of the product with such a poor floor design.