Pro: way more variety of edibles I can't make myself (like fruit gummies), and I know the strength before I consume.
Not really a con, but a letdown: legal retailers can't really compete with drug dealers prices, so it didn't hurt the illegal drug industry or generate as much taxes as hoped.
I'm in Canada where it is legal everywhere.
Since weed is so crazy inexpensive to grow, drug dealers have just dropped the price to where legal growers can't compete due to the price of bureaucracy and process and things like having to actually test for potency and label appropriately.