I have to go along with what the others said.
We got a small 6 qt. deep fryer mainly to fry fish, or battered fried veggies. We have not used it in a long time because first off, we just don't eat a lot of fried foods at home. Also cleanup is a pain, and if frying fish, the oil just gets wasted.
The biggest advantage with a deep fryer is that you have thermostatically controlled temperature versus putting a pot on the stove and trying to dial in the temp. Otherwise, I think they're a pain.