Like anything there is a learning curve, you can find lots of already made 3d maps and minis on the community hub.
You can buy it for 10 bucks on sale, no monthly charge, unlimited storage, and play more than RPGs, any board game or card game is on their as well.
Also you don’t have to use 3d… Like roll 20 you can just use a flat map and pog tokens.
I have to say that my favorite part is the lack of automation, I find that automation can get in the way of simpler less crunchy systems. I find that alot of times players spend time asking how to make an attack or Target an NPC (I use FG mainly) or asking where a thing can be found.
In TTS you just roll dice, you just teach them how to move the mini and roll a dice… Done. It works the same for every system as well.
Drawbacks… Fog of war is shady, minis tend to fall over alot (on hills ect), limited in game character sheets (i have icrpg,d&d,Savage worlds and tales from the loop character sheets)
I dunno… It’s my vtt of choice these days. I enjoy building scenes, it’s like crafting for me but virtually and then having players go through them. I find the lack of automation speeds up the game and makes it flow better and it’s cheap, an no monthly fees.