I just installed my CM 212+ a few hours ago. First time installing a backplate, took a few extra minutes, but not difficult by any measure, but also took the opportunity to pull out my 4870 and get a good cleaning of the heatsinks done. It is performing great so far, 27/48c idle (21c ambient) at 3.8ghz/1.4v.
The 212+ is just a couple mm too tall for my case (el cheapo CM 330 elite mid tower) so I will be modding the side of my case, again. Hotrod time.
I used two 90cfm CM 120mm fans for a push/pull configuration. It looks like the fan is touching the ram sticks heat spreaders, but there is actually about 1/2 inch of room between them: