personally, I have had bongs that small and they worked okay, but for that size, you might as well get a bubbler or a nice glass spoon.

Look where the bowl is too. That's right near the mouthpiece...I guarantee you will be burning the tip of your nose. If the bowl was down a tad lower, it probably wouldn't be that bad.

You have to gentle inhaling smoke through small bongs as well. As mentioned, water tends to splash up if you really pull getting a hoot.

I'd get a bubbler myself. It's small, and you don't have to worry about water getting in your mouth. Bigger bongs don't pose that problem as badly, and small bongs will singe your nose and water will get in your mouth.

It's up to you though, but for $20, I'd go with a nice glass spoon. Get $40 a buy something a bit bigger so you can save burnt skin and bong water in the mouth.