I'm ~20ish and playing with 2 other people and it's pretty cool. There's a LOT of quests and shit to do. I host the server so I turned off some QoL shit like weapon durability which sucks ass for proj weapons, and increased grow speed/craft speed. Combat's pretty good but you absolutely get swarmed solo sometimes. We also made the mistake of fighting like level 15's at level 8-9 and it was a bit of a battle. They die at a decent pace, but nearly every hit from every mob did 3/4 my hp.
This game is WAY more flushed out than I expected. It's literally an MMO in a Survival game. I'd love base defense and some other stuff, but I'm only level 20 so I've got a lot of stuff to see and probably some new mechanics still. Overall glad I waited from the early open beta until now. I could see being less wow'd if I saw these places just being added piece by piece every x months.