MET forecasts
i subscribed to the MET forecasts (and even attended a one day aviation weather seminar at the MET in Exeter which was well presented) but did not get much pratical use from either. The reason being I have a hard time interpreting the raw data, I much prefer the subscription I got with Skydemon that in addition to giving you flight planning grabs all the TAF's and METAR's for your route and translates them into plain English which is huge for me. Another thing I really like is I can set my comfort levels for visibility etc and when they are exceeded it automatically highlights them in red text, which interestingly enough was what the MET instructor taught us to do but manually and after struggling through the translation.