TL;DR - Yes, it's awesome. Yes, you should play it.

I was skeptical at first, thinking that Valve just went for VR as a gimmick. Having now finished the game, I can definitely say that this is not the case. Half-Life: Alyx is a fully featured addition to the trilogy. Perhaps not the addition everyone expected, with a change not in platform but an entirely different medium, but it's amazing nonetheless.
There are a few minor bugs here and there, some things need a minor amount of balancing, but besides that it's flawless.
This game has just set the bar for VR as high as HL1 and HL2 set back in the day for FPS games, and it will be very hard to beat.

TL;DR - Yes, it's awesome. Yes, you should play it. I was skeptical at first, thinking that Valve just went for VR as a gimmick. Having now finished the game, I can definitely say that this is not the case. Half-Life: Alyx is a fully featured addition to the trilogy. Perhaps not the addition everyone expected, with a change not in platform but an entirely different medium, but it's amazing nonetheless. There are a few minor bugs here and there, some things need a minor amount of balancing, but besides that it's flawless. This game has just set the bar for VR as high as HL1 and HL2 set back in the day for FPS games, and it will be very hard to beat.