I had a 12 year old edition of a cruising guide and I was able to get the most current-which was produced 3 yrs ago. Big changes? Likely not, but for a cruising trip to eastern Lake Ontario - from Lake Erie, I wanted the most current information available.
Not the first thing that I've purchased through American Nautical Services. If there is a problem they reach out immediately, then follow through with what they say. This is a very very good company to rely on.
Prompt service!