Since v 12.16 that I keep Opera as a secondary browser, and time to time I give a try to the current version. Next day I move it to the trash bin. Several years of intense Opera usage until v 12, led me to have feelings about it... well, had. The 1st disappointment came before that when I bought a then brand new WP7 phone and discovered that Opera had no plans to support a WP version. Before that I had Symbian with the appropriate Opera version that synced perfectly with my desktop Opera browser.
Nowadays, consistent with the "smart" advice above - love it or leave it - I no longer use Opera.
However, as I am curious, I would like to see credible stats with data of Opera users numbers and satisfaction over time.

Originally posted by leushino:

They're in the process of rewriting the entire browser from the ground up and that's why some of the features are not present. As each new version is presented, features are added.....

So they should name it as being Opera Next or a beta version until it is fully re-written. Naming it v.14 or v.15 is misleading, that thing should never be publicly showed as a final release.

I hate to admit that Opera committed suicide. My default browser for so many years is no more. I have just tried v.16 hoping for a miracle that did not happen, It crashed when I tried to load the v.12 Bookmarks as suggested.
Gave up... keeping v.12 as a memento only, sadly!