I have been using KiCad and on this forum for several years. I ordered boards from JLCPCB about 10 days ago and received them today. The process went surprisingly easily, in spite of the fact that I am using a 5.99 nightly build. The vendor had an accurate image of the needed gerber settings in the KiCad dialog box so that was also easy. The boards look quite nice although my 16 mil via holes look smaller than expected. The worst part of the process was that the shipper notified me that the package was delivered but I did not have it. After calling the shipper I got my boards.
My boards are 2 layer with components and silkscreen on only one side.
This is intended as encouragement for anyone who is thinking about ordering a board. Study your gerbers carefully but then go ahead and dive in!