I like keeping my phone in my pocket rather than taking it out 50+ times per day to see if an email or text is trivial or not.
This. I didn't realize how annoying it actually was until I didn't have to do it anymore. I like my current Pebble 2 quite a bit, and am looking forward to the Pebble 3.
1) Make the switch the first day you get back from a longer holiday and are already out of your normal routine.
2) You *must* get a nice floor mat, preferably a dense memory foam mat designed for standing cubes. Working in your socks (if your employer will let you) while standing on said mat almost feels like a foot massage.
3) Another *must* - don't get a desk-height chair! At least, not for a while. You'll find yourself sitting way too often and never get adjusted to standing all day. Most of my fellow "standing" co-workers that have tall chairs sit at least 80% of the time.
4) It takes a couple weeks to get used to standing. Stick with it.