Definitely not on my Firefox. It feels smooth as organic grass-fed butter.

As a beginner web developer aiming to work remotely, they have me. I want simple, fast, colaborative, and they have it all plus "mindblowingness". ;)

Not only that, sites like this get me excited and make me want to develop something as good.

I can only congratulate the developers!

I'm on Firefox 38.0 on Linux, my laptop is pretty cheap, but on Chromium everything's super smooth.

Beside that, the app is very slick.