I’ve changed keyboards quite a few times over the years. At first, it was simply because keyboards are a cheap part of a computer — and I spend my entire day using one.
For a small price, you could get a slightly different experience from your everyday work. I’ve had many types: membrane, mechanical, and scissor-switch. From the cheapest $5 models to fairly expensive ones around $100.

The more of a utilitarian and professional tool the keyboard became for me, the more demanding I grew. Over time, I wanted at least backlighting — preferably customizable (that’s why I first tried the old mechanical Corsair models). Since I work with graphics, I spend most of my time in the dark. Then I began to care more about tactile feel and light key presses. So I eventually gave up the Corsair mechanics in favor of scissor-switch models like A4Tech and Logitech MX keyboards.

However, because of my work style — constantly changing brush sizes and tools, pressing the same keys hundreds of times a day — none of them lasted more than a year. On scissor keyboards, the most frequently used keys simply started to fall off.
And as much as I liked the key feel of Logitech, I hate that company for constantly trying to reinvent keyboard layouts. I also missed extra functions — like dedicated volume up/down buttons or media controls.

When I first saw the Corsair K100 Air, I instantly fell in love. It looked exactly the way I wanted, and it had every feature I’d been looking for. It offers every possible connection option (unlike Logitech, which only charges via USB): 2.4 GHz wireless, Bluetooth, and wired connection.
The only things that held me back were the noise level — which is impossible to judge from YouTube reviews — and the price. It costs like an airplane wing. I spent over half a year circling around it before deciding to finally buy it for my birthday.

After a year of use, it still makes me as happy as the day I got it. It’s a pleasure to type on. And if it were to break now (which it hasn’t — unlike the others), I would buy the exact same one again.
I have zero complaints about connectivity or any other aspect of its performance. The key feel and tactile response are excellent — I was worried about that at first, because regular mechanical switches had always felt too stiff to me.

As for the noise level — I’d say it’s about average for a mechanical keyboard. The spacebar rattles a little. It’s far from being as quiet as a laptop keyboard or the Logitech MX. But unless you work next to someone sleeping, or if you usually wear headphones, it won’t be an issue.
Overall, I can confidently recommend it.