Generally :
It's hella nice if you're interface-anal.
Which I am, especially since my mouse/kb follows me through multiple generations of computer, and they're how I interact with the system.
Most people focus on the PC, and get whatever monitor/mouse/kb.
And even so, their experience is mostly defined by the monitor/mouse/kb, and what the hardware is doing behind the scenes is of little importance - so long as it gets things done.
Even old computers are plenty fast for everything (bar gaming on high settings with the latest games) - granted that the computer is kept clean of junk-ware and useless processes.
Specifically :
The 'Cherry red' are a rare soft spring variant of the linear 'Cherry black'. They're some of the most sensitive (low pressure to activate) switches you can get. The weight of a finger can activate them - without even pressing. You can type silly fast, and have the lowest human input latency (if you're doing twitch gaming).
Down side is an increased need to 'keep your hands under control', and no tactile feedback. (a big deal for those folks that like to feel an affirmative ka-chunk - note that tactile feedback is not directly associated with button activation, but merely with the tensioning mechanism, be it a slider, rubber dome, spring buckle, etc.)
You basically have to be a raging nerd to even care... but whatever.
Note: linear switches are generally hated by most, and loved by few. If you wanted to try a high end mechanical keyboard, you're more likely to like a brown or blue switch based board.
I've read that the capacitor switch boards are the perfect blend of feedback and force, but I've never used one.
I've used this one before :
http://www.daskeyboard.com/model-s-ultimate-silent/
In a sense it's stupid...
But then again, you'll sound pretty stupid trying to explain a fender vent to a non-car-person using any reasoning other than "it looks cool".
-scheherazade