While it's definitely more niche than many other Pokemon out there in terms of popularity, it does have a lot of die-hard fans who would love to get their hands on this particular card
Actual results vary significantly box to box
If you just want the devotion, a large flying body with potential Demon synergies, and the extra card draw, you could (again) run something like Sundial of the Infinite or Torpor Orb to stop that enters trigger
I think all the new summons are incredible in general not just in a Counters deck, I think Summon: Yojimbo and Summon: Valefor will be showing up in a bunch of future brews
Following the single cards, I checked the prices of sealed Sword & Shield products and, no surprise, there were huge increases on the secondary market
In the meantime, if you're a Vanguard fan as well, I recommend you check out my Journal posts at some of my deck concepts for the D-Series and let me know what you think