Are there any alternatives?

The closest alternative from Logitech is the G Pro mechanical keyboard, which packs largely the same feature set. But it doesn’t come with the same great switches, nor the comfy wrist rest, so I’d pick the Razer of the two.

　　Meanwhile, Corsair carries the K70 RGB TKL Champion Series, which does have media keys and also does 8K polling, but like Logitech’s board, doesn’t have the same comfortable switches. The wrist rest, again, is missing.

　　

How long will it last?

The Huntsman V2 TKL should last a minimum of five years under normal use, though I do expect the wrist rest will need early replacement during that time — maybe twice. Razer covers the keyboard with a two-year warranty.

　　

Should I buy it?

Yes. Priced at $150, the Huntsman V2 TKL is one of the best off-the-shelf TKL keyboards currently available.