I voted occassionally.  I can definately say that I don't consider it one of my "go to baits" but I still throw it at least once every time out.  Its good for at least a fish or two.  

I voted occasionally...I have caught many fish throwing buzzbaits at all times of the day and here in Oregon I fish many small ponds and sloughs that don't have the same patterns as some of the big lakes!!!

summertime in the rivers is much different than summertime in the lakes.

that, being said, even in the hottest part of the day there is often shade & current along some parts of the bank that fish will hold on.  a buzzbait is a Very good "locator" bait that allows you to cover lots of water in a short time.

the plus about this, is that not only do you get the thrill of initial huge strike, but, if you miss the hook-up, you can always throw a worm or tube back into the area & usually catch the fish.

and, for what it's worth, i've got/tried different types/models of buzzbaits, but, Nothing beats the original Lunker Lure!

Look at all the replies for "low-light, overcast, dawn and dusk, etc."  THAT is why I throw one all times of the day... with much success.  I might go through three different styles, sizes, colors, trailers and retrieves before I find something productive.  Yet, it is a good go-to lure if you can throw it with the same confidence as other go-to lures.  Granted, I have thrown it enough to find out the subtle differences and 'patterns' in which it can excel.  Anytime you limit ANY lure to certain applications, you run the chance of missing out on something that could be quite special.  I personally need to remember that with crankbaits this year .