I am a Seats.Aero convert. USA-EUR (Large US airports-Large Europe airports) or WST-EUR (Large West Coast) or UAH (United Hubs) for any date range I want give me lots of alerts that aren't useful, but they come via text and email. I am able to glance at the text to see the airports and decide within 2 seconds if I need to look at the email which will show me flight numbers. I find it very efficient and feel it drops the chances of me missing something to near zero.

My only complaint about it is a fair amount of phantom space particularly on LOT and/or through WAW for some reason...

But all in all, worth the pro subscription. Which also gives me PZ/IN/RN alerts by day or flight number.