personally from my experiance(which isent that much) i like rios, there small in size but they pack a wallop, plus it takes in water from all sides of the caseing, so its not like 1 area will suck a fish and make it stick to it, there have been rummors(dont know weather there true or not) that rios have a tendancy to fail or to have trouble re-starting, but i havent had a problem with my 2 since i got them(about 5 months ago)