Had seen various tuners being used in our local Uke club (UkeJam @ Godalming). I'm a noob to Uke's but quickly realised that new one's go out of tune really quickly, so a tuner is essential. This one looks really stylish and has a really clear display and really simple way of working. They do other models with different functions, but this one is the SN6 version, designed especially to tune just Uke's. Very easy to work out how it works, clip onto the head, turn it on and pluck a sting. Its display indicates to tune up or down and tells you the note being played. This is also really useful for us noobs as you can play a chord - and usually it will display the chord note you are playing.
I've just bought a 2nd one for my partner - as we keep having to swap between our uke's. Really good product.