Are there any alternatives?

Among mainstream 60% keyboards, none of them offer hot-swappable key switches. Outside of that, there are a few cheaper options:

　　HyperX Alloy Origins 60: Much cheaper than the K70 Pro Mini, but the software isn’t as good and it doesn’t support wireless.Razer Huntsman Mini Analog: Slightly cheaper, but doesn’t support hot-swappable switches due to Razer’s unique analog key switch design.SteelSeries Apex Pro Mini: A much more expensive alternative that stands out with adjustable OmniPoint switches, but not worth the money.

How long will it last?

You can swap out the key switches and caps on the K70 Pro Mini, so it will last as long as you keep up with it. On its own, you can expect close to 10 years before a key switch gives out.

　　

Should you buy it?

Yes. Among mainstream keyboards, Corsair is offering something no one else is with the K70 Pro Mini Wireless, and the small issues with battery life are negligible with how much else it has going on.