Opera is Excellent and has always been very good. Very fast.
Opera is a very fast browser but has a problem with a lot of javascripts and style layouts. I had a lot of hope for Opera but it didn't work out for me on the PC platform. It is, however, about the best mobile device and cell phone browser you can find.
this is only a big downside if one is doing web development in the computer industry (since the industry , some within it anyway, would favour a snazzy website even if it doesn't display right in some browser like Opera that most people don't use. )
That only applies to a techie in a very specific situation.
But for a sensible end user, or any other techie , that just wants to view a website and doesn't care about other stuff, and has little patience with features so snazzy that they don't display in Opera. Then they don't care.
Infact, at least outside of industry, if a techie was writing a website, he'd want good browser compatibility , particularly with Opera, which is a nice one for techies (and even for end users too, now).