I bought the Apple Pencil the same day as I bought my 2015 12.9 iPad Pro. The experience was fantastic, but due to the size of the 12.9 Pro and lack of convenient way to transport the Pencil, my use was limited to drawing and sketching at home, and graphic "brainstorming" of ideas. No real regular use. (The 12.9 Pro was too large to transport from home to work without a carrying case)
That changed when I bought the 2018 iPad. The form-factor of the iPad and the MoKo Pencil sling made it an extremely easy-to-transport setup. I now use the Pencil much of the day. All that I previous did before, but also taking notes at work during meetings and laying out project plans. I've created custom notebooks for use with GoodNotes that allows me to organize bits of info in a more tactile way than is possible with something like OneNote.
i use apple pencil for two years as a professional artist. its my second favorite stylus, wacom EMR is the best i have used. the apple pencil is a good stylus, i use it to touch up traditional drawings/paintings for social media and take notes. i dont like making fully complete art on it, the tablet lacks power and software capability for my style. but i enjoy the convenience and the lightness of the ipad for sketching and low resolution color studies.
but i think the pencil really needs to be updated, the feel on screen is not as good as it could be and the battery powered stylus is VERY annoying. its a great entry level system though, i take it everywhere i go along with my traditional sketchbook. usually though, i prefer drawing or watercoloring in a real sketchbook. the ipad still has a long way to go.