I'm pretty late on this but I have this stylus and it works great on my Note 10.1. https://store.wacom.com/us/en/product/CS300UK/
I haven't tried it on a Note Pro12.2 yet as I've just ordered mine.
Sorry I guess I should elaborate a bit. it is about the same size as a ball point pen. Any of the Wacom Stylii for Wacon penabled devices will work well and they have a huge assortment now.
I had that bamboo one too but it had precision problem - about 2mm off the pen tip. The pen is only compatible with galaxy note 10.1 older versions and I gathered that it works well on Surface Pro too.