I’m using Middleman for a pretty simple portfolio website. And it’s pretty great, been using some gems like bourbon and neat for gridbased design and easy CSS3 acces!
A small (but irritating) problem I do have with Middelman is that when I build my project all my paths get a “/” in front of it.
Meaning <img src='images/profile-me.png'>
becomes <img src='/images/profile-me.png'>
and then I have to change it in the code. Middleman does this to my stylesheets and scripts too.