I have seriously considered getting the Red Sea Reefer tank and have read up on TONS of peoples' experiences with them and have gone through several pictures of various setups. Here are some pros and cons for me personally:
Pros:
1. From all accounts, they are very well built tanks and stands, with quality craftsmanship.
2. The Reefer series at least is relatively affordable.
3. The tanks and stands look really sweet! I have seen one in person and absolutely love it!
4. The Reefer tanks have a nice foot print
Cons:
1. Size - unfortunately for me, the largest tank they have in the Reefer series is a 92 gal tank (I'm only taking tank volume into consideration here). I'd personally like to get a 125-150 gal tank for my next setup
2. Sump - I don't quite like the way the sump is set up. The Reefer series comes with the sump so if you want to do away with it, you will have a wasted piece of equipment and have to spend extra $$ on a new sump. What I don't like about the sump is the way it is configured. Doesn't have a whole lot of open room for things like carbon/GFO reactors, macro etc... Also, their ATO container is not the largest either resulting in having to fill it out more often than I would like. I hear from others that their filter socks are a little tricky and not a very standard size.
3. Overflow box - I would like to go with a Bean Animal overflow setup for my new tank so I don't like a big overflow box in the tank (which cuts down on the area inside)
Mind you, these pros and cons are just my personal take on them and they may or may not be deal breakers for you an what your plans are. Just wanted to pass along as food for thought...
Cheers!
Yash