The minute they went into the tank the were a fantastic hit.
I have a pair of golden bristlenose Plecos the male had made his home under the internal filter system , which he had to share with other loaches for the last 2+ years. I bought the Pleco caves to give the plecos somewhere else to hide. The caves had only been in the aquarium for less than a day and both the plecos had made themselves at home. Now about 3 weeks later we have a dozen + babies making their home in the community tank.
It was easy to order the Pleco caves on line from the Fish Room and they arrived two days later, they were well packed and survived the courier without any issues.