My employer paid for it for me. Since I have to work from home periodically, they agreed to that. Goes right along with the VPN connection they provided.
I had to ask for it to get it, but I firmly believe in asking.
I generally just VPN into my work system and do everything there, so there's no real reason for them to spend the cash to license my home system.
I've installed ApexSQL, and it's actually quite nice. The free plugins include search, refactoring, and auto complete which are neat. The auto complete isn't as slick as SQL Prompt, the Refactor still does some funky things which I'm sure I can fix with configuration, but the Search is amazing! I'm not sure if RG has a similar product, but I can definitely see me getting some use out if it.