As a consumer of cannabis for several decades prior to legalization, it has indeed gone very well. I am in Ontario and my first legal online order took 3 weeks, but delivery is now typically 2-3 days.
Brick and mortar just recently launched in this province, it was rushed and isnt in good shape. Other provinces are faring better in this regard.
The product selection is large, but in stock inventory of lower-priced products especially tends to be lacking. Some clearly over-priced products are trying to be the "Apple of weed" and failing, the market should sort that out.
An unexpected challenge of legalization is that new users can get overwhelmed by choice. Our government has unfortunately repeated the old indica=sleepy, sativa=energetic nonsense in the official literature despite advances in the science showing that while these distinctions are great to seperate plant types they distinguish between effects poorly.
I have been working on a project [1] that attempts to index the scientific literature and provide a better, evidence-based path towards cultivar selections. Every endocannabinoid system is different so this will never be totally correct, but it can at least trim down the options for new users.
[1] https://www.whatsmypot.com