I use it but not on long passages so far.
It has got a lot better than when it first started. I find it very useful for quickly checking different routes and times. It allows for tides which here in the UK is important and affects most decisions.
are good for planning.
The only gripe I have is the polars are not good for a catamaran
. I have to reduce the length to get anything near to ours. I think theirs are based on a racing
cat! Don't know about mono's.