Not an expert, but I own a board with Micro Switch Hall Effect switches (Diablo 1620). Some thoughts: In theory, Hall Effect switches can be much smoother than MX switches because the slider doesn’t have to scratch against a contact leaf. In practice, however, Hall Effect switches are really susceptible to dirt. Some of my switches are as smooth as Alps SKCC Green, but dirt has made most of them as scratchy as pre-retooling MX Blacks. For better or worse, Hall Effect switches have longer travel than MX. For me, long travel is fun in short bursts but gets tiring after a while. Did I mention my switches are certainly not dustproof and probably not waterproof? Micro Switch housings are even more susceptible to dirt than Alps. Keeping them clean is a constant struggle. Note that Ace Pad Tech’s HE switches are waterproof and presumably dustproof; I haven’t tried those though. The major advantage of HE switches is of course their reliability: 30 billion keystrokes lifetime per switch. (Compare Cherry MX at 20-45 million). This would be a lot more impressive if they weren’t so susceptible to dirt. For reasons that somewhat confuse me, in theory Hall Effect switches can be polled an order of magnitude faster than MX switches, making them the ultimate gaming switch. (See dorkvader’s excellent Hall Effect sensing and wiring thread for details). In conclusion, HE switches have a lot of theoretical advantages over regular contact-based mechanical switches, namely incredible reliability, perfect smoothness, and high polling rate. In practice, however, these advantages are offset (in Micro Switch HE at least) by low dust tolerance, tiringly long travel, stiffness, and of course the ridiculous difficulty of conversion to USB. Honestly Honeywell HE switches are a bit overrated in my opinion. Answer from Abiacere on reddit.com