I listened to a podcast recently where a magician and author made a sweeping statement that systems like chaos magick and thelema didn't work, and that magicians in these traditions proved it by their "inflated egos". He wrote Crowley off completely and many others.
While we all have our own magical paths to follow, and one persons path may not be for you, simply talking to a few people from different traditions and paths and instantly deciding the system doesn't work, because you don't like them or their ideas conflict with yours.....well, that's just dam crazy! Have you tried working with the system to get results...the proof of the pudding is in the eating after all? If you have tried the system and it didn't work for you, this doesn't mean it's a useless system, maybe it just doesn't push your buttons, it doesn't use a symbol set that you can relate to? Also, maybe you need to create your own symbol set and system that works for you (as many chaos magicians do, and yes, it does work for them).
Now, I like ceremonial magick, goetia, enochian and thelema, especially the idea of a Holy Guardian Angel "floats my boat" and get's me results. Of course classic chaos magick methods such as sigils, servitors, paradigm shifting and all that jazz does too!
Wicca doesn't really do it for me, and I've met some bizarre and slightly mad people "claiming" to be witches. However, I would never just write this magical system off, that would be crazy, as many people practise witchcraft and it works for them, why on earth would I? I've maybe not even met people who are following the Wiccan path with any serious commitment, but simply do a few spells now and again and invoke the goddess when they feel like it (I believe they are called "blessed wannabes").
Come on guys and gals, lets stop arguing about whose magical system is better and works and just get on with it, lets leave all that crap to the people who are still arguing about religion and dogma!
See you when we all shake wands and create a few earthquakes to shake up the world...