If the router truly disables WPS when that little box is checked - you're in the clear when using WPA2
When using WPA2 PSK, use a strong key - this one is more than secure enough (not now, of course) -- "Thi4iSaPaa5W0rD"
it would take 781,514,782,079,074,318,856,775,914 brute force tries to break it... or about 2.48 thousand centuries using current technology @ one hundred trillion guesses per second
If we add a hashtag to that password on the front-end - 44,480,886,725,444,405,624,219,204,517,120 retries - that's a really big number, LOL...
Even with an array of GPU's, and the NSA helping out - it's going to take a while...
https://www.grc.com/haystack.htm