Im a fan of the tried and true cast iron dutch oven on top of a stove burner. Fill it with oil, stick a candy thermometer (to measure up to a proper frying temperature, between 375 to 425) and crank the burner.
The reason is that you can get far more energy out of a cooking stove vs a 15 amp electrical circuit. When you plunge a basket full of frozen chicken nuggets into a weak electrical fryer, it is limited by the current draw how fast the oil will be heated back up to proper frying temperature. The longer food spends at less than ideal frying temps, the more grease is absorbs and results in badly fried food.
Take the same chicken nuggets and submerge them in an oil filled dutch oven and crank the heat to full blast. By the power of the stove, that oil will recover to proper frying temps far sooner. Plus the iron, with its thermal mass, is better for retaining heat than typical electrical fryers constructed from aluminum.
Plus cast iron dutch oven is much cheaper, bigger than most countertop electrical fryers, contains nothing electronic that will break and can be used to cook other non-fried recipes.