SAN ANTONIO -

A good knife is a valuable kitchen tool whether you're a home cook or professional chef.

So is it worth it to fork over $10 for a knife that's promoted by celebrity chef Ming Tsai?

Chef Johnny Hernandez, the culinary force behind La Gloria and the Fruiteria, agreed to give the  Aeroknife a whack.

The ads and packaging for the Aeroknife claim it is twice and smooth, twice as fast, never sticks and never needs sharpening.

"Those are big words," Hernandez said. 

At his Fruiteria on South Flores Street, Hernandez first tried the knife on a pineapple.

"This is probably the toughest thing to cut. The skin is so thick," Hernandez said. "It seems to be doing OK."

Next, he tried a thin-skinned papaya, which requires more precision from a knife.

"So it has a serrated edge, and it's sharpened on both sides, which is good," Hernandez said. "That means it's going to have better accuracy versus being sharpened on one side."

He was able to skin the papaya easily with the Aeroknife.

"It passes the precision test," he said.

The Aeroknife is lightweight and has an ergonomic handle, which Hernandez liked.

What's most noticeable about the knife's design are the holes in the blade. The idea is that with the holes, it has less friction and food will not stick to the knife as you cut.

When Hernandez tried cucumbers and tomatoes, the slices did not stick to the knife as claimed.

As for whether it will never go dull, that's a tough claim to test in a day. 

"I can see where somebody at home who doesn't do this for a living would really appreciate this knife," Hernandez said.

Bottom line, the Aeroknife cut it.

For a list of recent stories Marilyn Moritz has done, click here.