When we had both mold and rats in our apartment, they were unresponsive, unconcerned, and even gaslighted us, telling us that it was our fault the rats got into the apartment.
They never once brought in professional exterminators to assess the problem. They only continued to bring in their building manager to set traps.
The rats lasted 7 months. They kept chewing through the back of the cabinet under the kitchen sink and getting into our kitchen. When we asked Cobblestone not to raise our rent because they hadn't gotten rid of the rats, they told us they didn't want us to live there anymore. The following day, without us having responded to their message about not wanting us to live there, they put up a for rent sign and began showing new tenants the apartment. We had one month to find a new apartment and move.
When having a package accidentally sent to the tenants in our Cobblestone apartment after we had moved, we chatted with the new tenants and found that Cobblestone never disclosed that the apartment was infested with rats.
They really are horrible. Their priority is not the comfort and safety of their tenants. Avoid them at all costs.