Its main drawback is that investors can never be quite sure what assets they actually own.

ECONOMIST: Shares

Its main drawback is that one has to quit a game in progress in order to view photos.

ENGADGET: Switched On: Stuck in the Middle with UMD

The main drawback of a currency union is the loss of an independent monetary policy to cushion the economy against external shocks.

ECONOMIST: Should Australia and New Zealand form a currency union?

Sipuleucel-T's main drawback is that each treatment has to be handcrafted to the individual receiving it, using dendritic cells from his own body.

ECONOMIST: Treating prostate cancer

It eliminates the main drawback of conventional email: not knowing whether a message has been received and read, or is buried somewhere in an overflowing mailbox.

ECONOMIST: Word of mouse

The site's other main drawback is its limited geographic relevance.

BBC: Tools to plan your itinerary faster

But the main drawback to the Lytro I discovered is that it takes a while to learn how to spot and frame pictures that show off the camera's refocusing abilities.

WSJ: Lytro Takes Fresh View on Picture Taking

In his opinion, Mr Buchanan's main drawback is that he appeals to conservatives - and the Republican Party already has a conservative candidate in George W Bush running with a very conservative vice-presidential nominee.

BBC: Reform Party pulled right