Acrylic is very strong, more clear, and personally, I love the look of it. I've had two - a 30 and a 50 gallon...long since sold. I now have glass because whoa acrylic tanks are spendy when you get up into the bigger sizes. It does scratch easily, but with some care and the proper tools, they can remain beautiful for a long time. Just make sure you buy acrylic safe algae scrapers and such, be very careful with the gravel and ornaments, and never ever ever use glass cleaner or paper towels on them.
The only downsides, in my opinion, are the cost and most of them bow some on the long sides. This isn't a leaking issue, they just aren't as stiff as glass, and that bothers some people.
In all my years of aquarium keeping I've never had a tank leak, glass or acrylic. However, I've had many water messes not related to the tank. Most recently I put a mesh bag with peat moss in a HOP filter that was too big. The water trickled down the excess bag I left hanging on the side of the filter. Stuff like that usually causes my water problems. Poor drip loops, failed pumps, etc.
And of course there is always the fun of just straight spilling a bucket of water