It'd be great if people could be less vague about their opinions, and a lot more specific if they believe the EC is making a mistake - the EU isn't perfect, but please don't discount it on a superficial hunch (which unfortunately seems to happen a lot these days).
From the press release I referenced:
Therefore, only a small percentage of Apple Sales International's profits were taxed in Ireland, and the rest was taxed nowhere. In 2011, for example (according to figures released at US Senate public hearings), Apple Sales International recorded profits of US$ 22 billion (c.a. €16 billion[1]) but under the terms of the tax ruling only around €50 million were considered taxable in Ireland, leaving €15.95 billion of profits untaxed. As a result, Apple Sales International paid less than €10 million of corporate tax in Ireland in 2011 – an effective tax rate of about 0.05% on its overall annual profits. In subsequent years, Apple Sales International's recorded profits continued to increase but the profits considered taxable in Ireland under the terms of the tax ruling did not. Thus this effective tax rate decreased further to only 0.005% in 2014.