I've taken the buses for 4 years here and they are NOT fine. Maybe for a casual visit (the subway system is pretty nice, it just doesn't go anywhere) it works out OK, but when I was taking my route from ktown to Torrance (6 different buses a day), at least 2-3 times a week one just wouldn't show at all. They also keep cutting the bus lines, and that's why I ended up taking 6 a day instead of the previous 4.
All about perspective, I suppose. A friend of mine did an internship for 3 months and the required him to be on trains and buses for about 90 minutes a day from downtown LA to, but it worked. Meanwhile public transit in my city is so terribly bad that while I live only a mile from the center of downtown I once chose to walk 7 miles because it would be quicker than waiting for the bus...