I agree with shennon here,
Magento is probably the strongest e-commerce platform I have seen yet. They have fantastic file management and coolest theming procedure.
In fact I have 2 platform installed - Magento and Zen Cart for my up-coming project on my server ( hostmonstor ).
BUT, eventually Magento is turning out to be a big heavy monster which is very SLOW!!! , even a homepage with static blocks takes long time to load.
Even though I have same amount of test data on both of them Zen Cart seems to load up pretty fast.
I think I am moving with Zen Cart with this one, the site is fairly simple and Zen Cart seems to have everything I need.