The Green Solution has the best loyalty program in Denver. Always getting coupons for concentrates and cartridges. Just got 4 grams of wax for $60 then with my rewards it only came out to be about $30 after tax. They do need more live resin and solventless options but other than that the staff is always friendly and excited to show me any new things they get in. Order online if your coming in on a Friday and Saturday night cause it does get busy here.