Short answer: absolutely yes
Long answer: I have the YN-465, it's the TTL version of the YN-460 and it works great, it's powerful enough for everyday use and the light it gives out is just as good as the high end flashes.
Before I bought the YN-465 I used a borrowed high end flash for a different camera (a flash for Pentax on a Canon camera) so it was effectively a manual flash.
Manual flashes are actually easy to work with if you have time for a test shot or two, just set something take a test shot and adjust up or down, I could usually get the right exposure with just one or two shots and I'm not an expert.
Now, there is a clear difference between cheap and high end flashes, the build quality is different and the cheap flash is not nearly as powerful, if my income depended on the flash working I would definitely go for the expensive one but for hobbyist use the cheap YN flashes are great.
I don't know about the YN-460 optical trigger because the YN-465 doesn't have one - but optical triggers are known to be useless in direct sunlight and when you don't have a clear line of sight between your on-camera flash to the off camera flash - so I wouldn't expect much.
You can get radio triggers on eBay for less than $15, I've used a borrowed set of cheap radio triggers for a few months and they worked perfectly almost all the time (but not all the time - and when they don't work you better have a backup plan). Now that I had to return the borrowed radio triggers I will be buying a set for myself.