these are sleeves... you get a cheap base, and then a sleeve that is in no way attached to the base and pops right off. in 2 minutes of testing, i had 4 tops come free in normal typing.
the ones that didnt.... i noticed almost immediately that the normal oils from my skin were collecting on it. within that 2 minutes, they began to feel slippery... you would hit the cap and your finger would just slip right across it.
these are just flat out NOT feasible as keycaps.
Fishypixelsnot sure. it may have been a combination of things... but typing on them was a struggle. i could easily glue them down if needed... but the texture and fact that they just collect the oils from your fingers and turn into mini slip-n-slides is more of an issue that the sleeves coming off.