Great tool to get a practical feel for switches. Switch reviews are like reading perfume reviews, more of a poem. It's hard to get a sense of what 'tactile' and 'clicky' means to different people.
The product really should come with just a cheap printed map of which switch is which; referring back to the image here works but shouldn't be necessary.
Admittedly, the first thing I did was mash this tester against my face. And yes, it was satisfying.
I really appreciate the sheer number of switch options. You can really get a feel for the variance of similar switches (ie the milky vs the standard gaterons), plus you get to see a lot of switches you have never heard of before (ie the aliaz switches). Highly recommended.
They appear to be fully functional switches with the connections on the back. I don't have a hot swappable board to test it out with to get you a definite answer. It would be nice to test the actuation points... they could be hooked up to a simple LED that lights up the clear base-but this switch tester is expensive enough as it is. This is good for feeling the actuation weights, there's a lot of variation in this set. Some feel like they'd be tiring to type on, and some (clears) like there's barely any weight and i'd mistype on them - but I've no idea really. End of the day you'll still need to type with a full set of switches for a while to see how you like it, but this switch tester helps narrow things down and give you a view of the overall switch landscape.