Elena Avramenko
Elena Avramenko reviewedInVisionPrototyping and collaboration for design teams
 NeutralPros: 

The only more or less good app available in the market

Cons: 

Loading time could be better / especially mobile version

All my designers loves the service, but I am struggling to use it, I find its UI/UX uncomfortable and not obvious. The most terrible is a mobile version of the web-site, extremely slow.

Elena Avramenko has used this product for one year.
Sally Goldman
Sally Goldman@sallygoldman · Program Manager at the Economist Group
I agree: I understand why UX/Design like the tool: for one thing, it is incorporated into Sketch for easy export. However, for the user of the designs, it's a big pain in the neck: the zoom to readability is difficult, the commenting doesn't work, etc.