As Washington state’s first legal marijuana outlets get set to open, Colorado is taking stock of its first six months of legal recreational marijuana sales.

Some of the conclusions are based on hard numbers, while others are more anecdotal. Either way, a leading cannabis industry voice says there are plenty of lessons that can be gleaned for our state from Colorado’s experience.

“Overall, it’s been incredibly successful,” says Taylor West, Deputy Director of the National Cannabis Industry Association, a national trade association based in Denver. “We’ve seen benefits such as less crime and increased tax revenues. And more importantly, we haven’t seen any of the massive negative effects predicted by opponents.”

Read more: Colorado’s legal pot industry offers lessons for Washington state | MyNorthwest.com