I've been using Sketch properly for about a month now and I have to say that I'm really impressed as are a lot of others now using it in the design community.
I first found out about it after reading a blog post by Meng To on How To Design Pixel Perfect Assets in which Meng refers to Sketch a few times and explains that it's great while designing for mobile as you can export in 2x even after designing in standard dimensions.
Sketch has had a lot of attention lately so here's a few blog posts and freebies that you may have missed:
Simple Vector iPhone Sketch Freebie
Browser
Wireframe iPhone
iOS 6 Template for Sketch
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