At first, I was happy to have tabs in Safari, but quickly changed my mind. I constantly almost close the current tab when I want to tap on the back browser button. And they get in the way when reaching for favorites or other options has you have to be careful not to close the tab.
Also, to close a background tab, I have to click the tab, then the small "x" appears, letting close the tab. Still two taps to close a page... It's not a big issue, but a bit annoying in the end