...well, "quality" compare to what? and what quality are you looking for?
That's a highly subjective question and is so open-ended that no-one can properly answer it...what criteria do you apply and whose opinion are you looking to find out?
Some might say it is in the top 7 of 15 common paint brands - but what standards do you have? are you content with just a new colour, or what? See, some people don't know the difference between a French restaurant and Macdonalds, because their criteria are 'fast, filling and cheap'. Both serve you meals, both taste good - but if you've never had a meal in a French restaurant, the only yardstick you'd have to measure any new meal against would be against Macdonalds.
Similarly, if all you've ever used is Walmart paint, and then someone tells you about Sherwin-Williams, you might say "Why would I pay $45-a-gallon when there's $8-a-gallon from Wally? So, it all depends on your standards, what you are prepared to accept and what you are not, perhaps what price budget, but it can end up being like you asking us: "is a Buick a good car"...
Depends what you've been driving and where you want to go.