I live in the islands, commute to work on another island and use WSDOT several times a week. When ferries are running on time, it’s very useful. When service is disrupted, WSDOT becomes less useful. I agree with other reviewers that real time updates are needed. Also, the booth workers in Anacortes claim that WSDOT is not reliable as far as quotas, which also seems like a gap that needs to be mended. WSDOT still is very useful for making or altering reservations on the go, or checking to see how much space is left on the ferry you’re gunning for. Having the local numbers for ferry landings is a good back up as is knowing how to interpret Vessel Watch. The more fluent you become in “ferry”, the more useful WSDOT becomes.