I suppose I should preface this by saying I am on a Windows machine. Even with gdi++, text rendering isn't as beautiful as a Mac's (I'm also on Windows 8.1. Ugh). Anyhoo, I am in the process of redesigning my portfolio and am using Source Sans Pro for the body text.
I am very irritated with the jagged edges that I have been getting with @font-face and I've even been using "text-rendering: optimizeLegibility".
I prefer to full control over my site assets, but I'll use Google's service if I have to.