Typing on a virtual keyboard can drive some people virtually crazy!

One user told us, "I wanna bang my head against the wall. It's crazy!"

It's a common complaint. So when Microsoft recently unveiled its new "Surface" tablet, it offered two keyboards for sale, right from the get-go.

Consumer Reports says both have full-sized keys, are thin and light, and double as a cover.

If you already have a tablet and want a separate keyboard, there are options there, too.

Charlie Davidman, an electronics expert at Consumer Reports, looked at four more tablet keyboards from Targus, Logitech, and Zagg.

Charlie Davidman with Consumer Reports says, "They offer the convenience of a physical keyboard, and they have keys that you don't often find on a tablet." (super)

Like a tab key and dedicated number and symbol functions.

This $65 Targus keyboard works with either iPads or Androids.

It's small and light, with virtually the same size keys as a typical laptop, and it runs on triple-A batteries.

Charlie explains, "The downside is that it doesn't act as a case or a stand, so you're just lugging around an extra accessory."

For a bit more money, consider a 100-dollar Zagg Zaggfolio keyboard case. You can get one for either later iPads or Android tablets. It has large keys and doubles as a stand, plus it latches securely.

And the carbon fiber case feels very protective.

When you go to buy a keyboard, be sure to check it's compatible with the tablet you're pairing it with, particularly if you have an earlier model. All the tablet keyboards Consumer Reports tested are Bluetooth compatible and can be used wirelessly with any Bluetooth tablet.