Originally Posted by
Inkanyezi
So, anecdotally, we know that these units can fail and that some of them will, but we don't know anything about their failure rate. However, they all come with a warranty, so this type of occurrences, when they happen, will mostly be remedied. After working as a technician in a very reputable German company that is proud of its quality, I also know that everything is not up to reputation... German Quality is some kind of word, but just words.
So, we know that Canon also has such reputation, even if in that case it's not "German Quality", but Japanese. So of course all Canon cameras, particularly the more expensive ones, and all their lenses, must set perfect focus directly from start, as they are "factory tested". Now if that aint moot, what is? There were rumours after people found out that Nikon cameras had back focus and front focus issues, that Canon should be better in that regard, only because the problem was recognized by technicians at Nikon. But were they? Does anyone have the stats? Oh, I know, Roger Cicala tried the most prestigious of the Canon models, and alas, they do have focusing issues, and severely so.
And Canon is into the third generation of TTL flashes, so older units are not compatible with newer cameras, and the modes are different in compacts. But with luck, your camera and the flash you get are of the same generation. You won't be equally lucky with bodies and lenses. Newer lenses and newer camera bodies have new systems for setting focus, incompatible with older bodies and older lenses. So a new lens and old camera won't be sure to work well together and vice versa. But Canon will not tell you.
So, until reliable statistics will tell me that the failure rate for no-name electronic flash is unreasonably high, I'll stick with the conclusion that they are generally better bang for the buck. If you feel more comfortable by buying a brand product and believe that it is better in a few ways, by all means, buy it if you need it and can afford it. If it fails, it also comes with a warranty, just as you can have your lens and body tuned together for focusing if you send it in. It surely is harder to point out the culprit when third party hardware is at play, so don't expect the same service with another brand of lens for your camera, or another brand of flash. But still, the thing does come with a warranty. As long as it does not fry your camera, you're mostly OK. Whether third party or original brand. But somehow, I have a doubt that they're more meticulous about flash gear than lenses.