TL;DR
Awesome! It works *most* of the time when I need to enter a Google Search captcha while using a VPN.

My one time Buster repeatedly failed the audio captcha, I just closed the tab and opened a new tab and the search/captcha solved no problem!

THe steps are: use a VPN that Google does not like, try to do a Google Search, get challenged, check the "Select all images..." box and the pop-up happens, I click the orange human icon with a green check at the bottom to the left of the big blue VERIFY button, a new pop up happens that has a PLAY button on top. On my first test I had to click the PLAY button and it solved it fine! My second test has the PLAY button pop up auto solve and close without a click! Both times I was forwarded on successfully after the ad ons PLAY pop up closed. A third test kept failing when Buster checks the audio so I re-opened a tab with my search and the new captcha solved fine!

Overall, Buster is a must have for VPN users who want to use Google Search.