Is it worth it, depends. Is it a shop or an audit; the fee; and the MSC. I've seen storage shops listed for $15 or $20 that stay on the board forever. I did one recently for $30, but was hoping for more. For the time commitment, pics, and report, it was okay. Others on this board get $50 and up.
There is one MSC in particular that has storage audits that is slow paying and they have a long report which took me over 2 hours to fill out and have a minimum on site stay requirement. That one was not worth it.
I stayed away from another storage shop that required if the office was locked and the associate did not return within 20 minutes of arrival, then you were to self rent the cheapest unit. The MSC said they would reimburse you within 10 days for the unit cost and pay for the shop the following month.
My lowest offer to do a storage shop in a bad neighborhood with one of the bigger players was rejected at $55.