I got a Hario Switch a few weeks ago and, honestly, I wasn't sure where it was going to fit in between my Chemex on the one side for large, slow brews and my Aeropress on the other for quick, single dose fixes. But the Switch has fast become my favourite coffee brewer.
I have not seen much mention of it so I thought I would give it a shout out on here to see if there were any fans and techniques to be shared.
I opted for the 03 off the bat so I had plenty of room for immersion and, having used it now, I don't really see how the smaller size would work satisfactorily so - if you are curious - definitely get the 03.
I can only compare it to the Chemex, which is a bit of a different beast. I find that I can get a great balance of extraction and flavour out of the brew because I can immerse. For my work coffee I have settled into a medium grind of 18g coffee + 54g water, gentle pour for bloom, followed by a full pour (to 300g) at 30 seconds with the switch up so that the brew immerses, then switch down at 2 minutes to let the brew drain through the settled grounds. Then I vary the grind to sort any extraction issues with the particular beans I have.
I'm not sure if glass v plastic will make a difference like the ceramic does. I prewash my filters with boiling water which will heat up the Switch but I'm not sure how effective that will be.