I've been working fully remotely since 3 months or so and I love it. I have much more control over disturbances (i.e. people walking to my desk) and much more flexibility in how I structure my time. When I get in the flow of working I can focus fully, and when my focus is gone I can answer emails or take a shower, prepare lunch, that sort of thing. I don't have to adjust to other people's rhythms as much and it makes a big difference in how I feel about my work.

It's nice to have people around in an office and I do miss out on some of the quick conversations. Overall our team is quite distributed though so it's not much of an issue. I live with my girlfriend and a bunch of other housemates so it doesn't get too lonely. I do make a point of going outside regularly and getting some exercise (biking or hiking) since when I'm working I'm mostly behind my desk.