Terrible Customer Service
I had a very unfortunate experience with them. I own a rental property in Indy that is in an HOA. This HOA is managed by CMS. I bought the house about 18 months ago. On the HUD closing statement there was a line item where the HOA gets a year of dues (no biggie). There was also a CMS "account set-up fee" to CMS directly (ok, I should've seen this nonsense). There was also a "transfer fee" to CMS directly (I also should have seen this).
Basically at purchase of rental, I prepaid a year of HOA and promptly forgot about the HOA. Post close, I didn't receive any welcome letter or invitation to setup auto pay. Then about 4 weeks ago I received a letter saying we were 5 months behind on HOA fees and that we're being charged penalties monthly (annoying but ok). I go on vacation for 3 weeks and get back to find a "we're going to file a lien on your property if you don't get current" letter from CMS.
Of course, I write to them and instruct my property manager to cut them a check for the HOA fees (not penalties).
I ask politely if they could waive the fees because I had forgotten about the HOA but also I hadn't receive any welcome notice or any letters up until 4 weeks ago. My expectations were that they would respond like any normal company (Amazon, Nordstroms, Safeway etc). I figured we'd part as friends (I was wrong).
However their stance was "you're wrong, we're right - you need to pay the penalties in full" - Now we're not talking about alot of money here but it's just an upside down customer service model. In fact its completely backwards.
So if you want to deal with a company that will always put themselves before the customer, then I'd recommend Community Management Services.
If you like to deal with companies that put the customer first - I wouldn't touch this company with a 10 foot pole. If you're an HOA looking for a manager who provides exceptional service, this isn't the one.

