Everything looks exacly like in Sketch
Uses a lot of RAM memory and sometimes breaks and needs a refresh
They also have a integration with Zeplin and you can export all your layers into Zeplin.
Works very well. You can export every layer or group/object as JPG/PNG/SVG.
You can copy every text layer by just selecting it and Ctrl+C (copy as text), you can see the fonts and colors for text layers as well.
You can also share your projects with your team by email invite and public link.