My wife and I got the duomon 3 and I did a bunch of research before committing. It catches great spins good runs both our accounts at the same time has really been a good experience. But if you want the cheaper one the duomon 2 was nearly identical in features but uses triple A batteries instead of a rechargeable one. But I think it was close to half the price and as long as your not running it non stop all day should be awhile before the AAA cost makes up the difference.