I heard if you play perfectly on a totally random round, the dealer has less than a 0.5% edge (depending on the rules) which is very good for the player, compared to other games.

If you count cards on a small hand shuffled shoe, even with a basic system it is relatively easy for a player to have a fraction of a percent edge. Good players can have a few percent edges.

However, most casinos nowadays use large shoes and frequently (or even constantly) machine shuffle the cards. This effectively almost completely negate card counting.