Are there any alternatives?

At the price of $50, Asus has a lot of competition, most notably the Glorious Model O, which has a firm grip on the gaming mouse community. With that said, the Model O is much heavier at 67 grams, has a DPI of 12,000, and costs about $10 more.

　　Another alternative is the Cooler Master MM710, which has the same DPI as the TUF, a matte black shell, a weight of 53 grams, PTFE feet, and only costs $42.

　　

How long will it last?

The warranty included on the TUF Gaming M4 Air is just one year. I will say, in my time using this mouse, I cannot see you running into any issues, and with its water resistance, I can see it lasting longer than others in its class.

　　

Should you buy it?

Yes. The TUF Gaming M4 Air is a fantastic gaming mouse for the price of just $50.