Any disadvantages using an ordinary PC keyboard?

omar.m wrote:

Are there any disadvnatges of using a standard Windows keyboard?

I haven't found too many in normal day to day operations.

Are any keys missing for example?

It's the Apple keyboard that has keys missing.

Do I HAVE to buy an expensive Apple keyboard?

No, you can use a PC keyboard. A wired one should also do the at boot key commands as well.

I've been using cheap disposable PC keyboards for years on my MacBook Pro's for the fact that wearing out the built in one decreases it lifespan and resale options.

There aren't any disadvantages using a common PC keyboard with a Mac. Furthermore, it will work without any problem. The only thing you will miss will be the brightness, volume, etc. keys, but if you can't live without them and you don't want to buy the Apple Wireless Keyboard, you can use one without any problem.

If you are looking for a Bluetooth keyboard, make sure that is compatible with your MacBook