In the past I have used flights religiously. Its been great for me. I've even been in situations where it said a price X, I went direct to united.com and the price was X+10%, and when I went back to google flights and clicked through I really did get X.

However this year I did for the first time get the other way around where I couldn't buy the price it said was available. I've also noticed Kayak now just as good or better, and flighthub is generally great too.

So for me it used to be the best, now is good, but nothing amazing.