A friend of mine's parents had an arranged marriage, but it was pretty clear they loved each other, were delighted by one another's company, and were committed to the marriage and their kids. It was a happy marriage by all indicators.
My friend (daughter of the above) said part of it is they were both, as teenagers, committed to the idea of marrying whoever mom and dad found for them. They trusted the selection process. They also had good, loving parents who made sure the kids were comfortable with the match too, so it sounds like that trust was well-founded.
My friend herself actually married someone her parents found for her, even though she was born and raised in Canada and had done plenty of her own dating. Her logic was that her parents were just as likely to stumble across Mr. Right as she was, so why not at least meet the guys? She didn't see how it could hurt.
But it did hurt her, for a while. Her parents spent a long time finding a series of Mr. Wrongs, and my friend eventually told them to quit setting her up with guys. However, they persisted (as parents can annoyingly do, when it comes to badgering you about your love life), and eventually they found a fellow who my friend clicked with BIG TIME. (Seriously, those two were born for each other. They're an AWESOME couple.)
The two "dated" each other for a few months before marrying, and they did wait until the wedding night to have sex (although my friend was not a virgin), but she said it was lovely because -- if you think about how long it takes dating couples to start knocking boots -- they were both totally ready to go there after a few months. The "committed for life" decision was the big scary part of their equation, not the physical intimacy.