I only have a few in production. I'm using a 512GB 950 on my gaming PC (has plenty of cooling, so can't comment on the heat, the Intel 750s have a heatsink though...) , it's replacing an 850, in practice it's hard to notice the difference between them. In a virtual environment when you have multiple VMs running on the same SSD, it has noticeable gains, higher IOPS and transfer speed make a big difference.

Most things I encounter in personal use are either CPU or GPU bound. There is nothing worse than having an application crawl to a halt when it is not even using a fraction of your system resources. Single threaded and 32 bit only applications are the bane of my existence.