Excerpt: I have a Dell with WIndows 8.1 and no side numeric keyboard. I tried another brand and ended up pressing one number only to have another one display. Got frustrated not being able to fix it and so returned it. Since I use the number keys a lot, it was time to do some research.
Summary: I bought this mainly to play a game called osu!, I wanted to try a mechanical keyboard, but afford spending $60+ for one at the time, so this was a very nice alternative. osu! only requires two buttons for Standard, and this has 22 :p The Windows Key would of been nice to control a game overlay...
Pros: It has all the keys it says it comes with, it's mechanical, and works with USB or PS/2, pretty nice for the price.
Cons: I would of found it nice to have a Windows key (for very specific usage), but this isn't really a con for most people (but do take note of lack of this key)
Summary: My profession is accounting, so I use number keys all the friggin time. For me, it's utterly worth spending the extra money to make my day-to-day life better. Now, here's how I describe the mechanical keys on this keypad: 1. Light. Because there's not much resistance, its easy to type quickly. 2.
Pros: This Keypad does exactly as I expect it to, and to me was worth the price I paid. I read that the keys were mechanical and bought this with certain expectations (since I have a full mechanical keyboard at home), all of which were met. See Other thoughts for a rundown on these mechanical keys.
Cons: Expensive. I'm not knocking any points off because I knew it when I bought it, but seriously, this price plus shipping means I must have some kind of mental illness to have been willing to buy it, ha.