So it's been a while, but I finally have my hands on the GMMK Tkl w/ Gateron Clear switches (I also got some Blue switches for fun).
As someone who's only ever had experience with Speed linear switches, right away these things are quite a bit lighter. They require little to no effort to bottom out and have a "hollow" feel to them. I imagine they feel like super lubed up reds with lighter springs, with no more "scratchy" feeling that i found on the Speed switches. Just a buttery smooth, feather light switch and I like it a LOT.
If you're someone who's naturally quite light on their fingers when typing or gaming and think you can handle something even lighter, then Gateron clears are fantastic. I haven't experienced any unusual errors when typing either, but I know some people don't like them for this exact reason so your experience might be different.
Also the GMMK Tkl board itself is very nice. Minimalist design, black aluminum back-plate and of course the ability to swap out key switches. Even if in future I decide to change boards, i think it's a great thing to keep around for switch testing.