The reason being I have a hard time interpreting the raw data,
I use this one,
EGXW Waddington Current Aviation Weather Conditions and Forecasts, doesn't take as long to interpret...bear in mind it's only a guide and not 'official'.
In fact looking outside they have it wrong again, weather at the moment is overcast with cloudbase about 400'.
I cancelled a trip on Friday night as the forecast was miserable for Sat morning. As it turned out the weather wasn't miserable, I was able to do some last minute re arranging and took off with a 3500 ft cloudbase and excellent vis.
I rather like Billy Conolly's take on weather forecasters,
'Why do we need them? If I want to know what the weather's doing I look out of the f....... window.'