I've spent a lot of time typing and gaming with a full set of zinc caps with an aluminium space bar so I'll weigh in and give my opinion for any interested parties.
If you think you would like typing on the cool metallic surface rather than plastic, then you probably will.
I spent a fair bit of time with a full set of zinc caps on my board and loved it. The cool feeling of the metal is excellent, I find anyway, and definitely enjoyable in the warmer months when you come in from the heat and sit down to a nice cool board to type on. I never noticed them being uncomfortably cold or anything like that in winter, but if you're the type that sleeps under an electric blanket and wears USB powered electric mittens then I would definitely avoid as the cool touch is always there. Personal preference warning I guess.
Also, if you have sweaty hands I would avoid the metal caps at all costs. My hands aren't very sweaty at all, but during the summer months when I get scorched by the harsh Strayan sun I do get a bit sweatier than usual and when this moistness extended to the fingers it was pretty noticeable on the metal caps. Naturally I washed mine a couple of times that summer.
Something to take into consideration is they absolutely WILL make a noticeable difference on the perceived weight of your switches. I spent most of my time running these caps on blues which was pretty good but as someone who prefers heavier switches (MX greens are my current config) the metal caps were definitely noticeable. They did lighten the weight of the switches, though after I adjusted to it I didn't find this to be a problem. I wouldn't count this a negative overall, but it was not my preference, which was why I thoroughly preferred the zinc caps on my greens, your mileage may vary.
The result of them being a bit too 'light' was the same across reds and browns, I never bothered to try them on my blacks or tactile greys. Though I imagine the outcome would be the same; the metal caps when used on a switch with heavy springs feels quite like the same switch being used with plastic caps and lighter springs. Though with the latter config you lose the luxurious feel of metal caps underneath your fingers, which is really what the metal caps are all about. Luxury: the zinc caps I used looked like a million dollarydoos and felt like it too, to be honest I would still be using them but I switched back to plastic when I got my Miami caps and the greens feel better to me without the metal on them and I love the Miami colours. Something to bear in mind if you are in the market I guess.
Ultimately if you are interested in a set of metal caps I would recommend that you consider all this. They are definitely worth the investment, if you even THINK it might be your thing I would say go for it. Just PLEASE bear in mind that they will absolutely throw out the perceived weight of the switches you're using. So if the idea of using lighter switches is revolting to you then I would recommend you wait until you have some heavy springs/switches to try them. Otherwise, I would recommend using an all metal cap set.
I am actually selling my Zinc caps and Alu space bars in the classifieds.
https://geekhack.org/index.php?topic=73924.0I hope some of you got some perspective out of the 'review' I've posted. This was definitely not a shill post, but take me at a grain of salt. Either way,if any of you want me to expand just sing out and I'll post any thoughts!
