I, for example, tried to cast a love spell (the one with a blue candle that melts over a photo of the lover for seven days, which the website said was supposed to actually work) and absolutely nothing happened. Kinda disappointed so if anyone has been successful in casting a successful spell( doesn't have to be the love one) please share!
Here's the thing with spells, if you are not proficient in the basics required to cast (meditation, raising, sending and grounding energy, visualisation skills, working with the elements, colour associations, day, herbs, crystals, moon and planetary associations and establishing a strong connection to the world around you) then it doesn't matter what spell you do or how well it is constructed because the result will be the same - it won't work!
You wouldn't run a marathon without doing some serious training would you? And if you did you wouldn't expect to do very well in it. Spells are the same and in my opinion definitely not the place to start. In fact if you ask me if you are not in a position to write your own spells then I personally don't think you should be doing them at all.
If you really do want to learn then there are loads of articles and forum threads on this website that can help you, just use the search function at the top of the forums.
I hope this doesn't come off as harsh and please remember that this is just my opinion.
To answer your question I have done plenty of spells that had successful results, none of them from this website though so I can't help you on that. I would suggest looking at the profile of the person who uploaded the spell to make a more informed decision on choosing one to try.
I honestly don't work magic very often, mainly because I am more of an energy worker and spiritualist. Of course the considerable overlap of practices does mean that I do study how magic works and why. It also means that usually I don't end up working magic unless there is something that is stirring me to immediate dramatic action. (Someone I care for being in real need for protection, that sort of thing)
One that comes to mind is when I was living with a previous girlfriend. I learned she had a malicious entity following her for most of her life that had been attributed by her family to sleep paralysis/night terrors- a condition where a person wakes up from sleeping, but is still paralyzed and sometimes, still dreaming. It was only discovered when we started living together because I felt the attacks coming on the occasions that she would have these episodes.
Once I clicked into what was happening it stirred my protective nature, and I basically went to war against the entity. I cast a combination of the most potent methods I knew for empowerment, protection, and banishing. For the two years we continued to live together, the terrors had stopped completely, and she only had one sleep paralysis incident during a time she was under a lot of stress working on a thesis exam for her masters in geology.
I am not able to confirm if she is still free of the issue though, as we ended up going our separate ways a few years ago. But it at least appears to have been effective while we were together.
Personally, I do not cast spells from the internet, I have always created them on my own, and have learned over the years that the spell is way more effective if I write them myself. But that doesn't mean that spells on the internet won't work. I hardly do cast spells. I work more on gaining energy by practicing the basics over and over, it's always good to recap the basics no matter how experienced you are. To answer your question: Yes.