I've seen this same Sharper Image countertop convection at Costco recently. It's at a good price, relatively speaking, of $70. It appears to use a halogen heating element. I gather the halogen will aid in browning the food. I understand that halogen heating elements have a shorter lifespan than resistance ones, so that might be a concern. Some reviews on Amazon.com indicate that the halogen element needs replacement in as little as three months of use.
Last summer I bought a generic Chinese version, brand name of "Oyama", which has just a resistance element, and no extra spacer element. But it does just fine with chicken, which is what I use it for. I like the fact that it's easy clean-up, vs the splatter that occurs with most other forms of roasting chicken. There is some splatter onto the underside of the stainless steel fan shield, but it doesn't seem to interfere with cooking. It does require flipping the chicken over mid-way through the cooking, which is a slight bother but since the whole process happens so quickly (a five lb chicken cooks in less than an hour) it's not a big problem. And for $44 it was a relative bargain, and I think the resistance heating element will be longer lasting than a halogen. It seems to have no problem browning and crisping the skin of the chicken - especially if I take care to dry the chicken and coat the skin with peanut oil before cooking. I also like that that glass bowl catches all the drippings without burning them, which means they can be used as a flavoring for rice, or mixed with flour to make a gravy.
The first Oyama oven I got had a timer that didn't work out of the box. I was able to return it to the Chinese grocery where I got it for an instant replacement. That replacement has been working just fine ever since. The owner's manual is pretty skimpy, with just a couple of recipes, but I found usable recipes on-line for other similar ovens, such as the Flavor-wave. Mostly for chicken I use common sense - about 20 minutes for each side of the chicken, and a meat thermometer to check on the internal temp before stopping cooking.
I nearly always thaw the chicken before cooking, which seems to save energy and make the cooking more even. [this post was last edited: 1/8/2012-12:32]