I happened to have Twitch up last night when the live watch party for the first three episodes started, so I stayed up late and watched them.
I thought overall it was pretty good. It's not a licensed D&D show, so not using spell names or having the full range of powers and such makes sense. As noted, at least two more characters would have healing spells if it was actual D&D, but the scene was there for dramatic motivation, and having Pike as the only healer in the party is going to give more opportunities for dramatic tension later. Sure, the humor is a bit sophomoric, but it's true to life for a whole lot of gaming groups.
The cast are all excellent; it's really a unique opportunity to have professional actors who've already played these characters FOR YEARS prior to making the TV series. So they've worked out all the chemistry, the dynamics of the interrelationships, etc. There's very little of that early episodes/seasons "finding their feet" stuff that regular TV shows usually have where those things are notably weaker to start while everyone figures out the dynamic.