tc electronic PolyTune Clip Black Tuner

Let's make this quite clear right at the start. This tuner is AWESOME.
Tuning really has been the bane of my life for 30 years. I'd get a string tuned - go on to the next one - all the way through the six. Every one, as I thought, 'spot on'. I'd play a chord - it just sounded so wrong! So - start again. I'd spend more time tuning than playing. And intonation?! Just don't start me on that.
Well - in one of the Harley Benton Facebook Support Groups, a chap gave a little review. Said this wee gadget was the best thing that ever happened to him. Said it 'did' intonation. I was intrigued. How could this be? It was a bit expensive - as I was used to paying less than 10 Euros for a simple clip-on tuner - but I headed on over to TC's website and had a look at the specs.
I thought I'd give it a go - Thomann's guarantee meant I could always send it back, no questions asked, if it was no good for me.
Weeeellllll. I took it out of its smart little box and pressed the small switch. Oo! It burst into life with a rather fetching moving line of green lights. "Ey up", I thought to myself "this could be good".
I clipped it on my guitar and played a note. Lights moved back and forth. A letter appeared. It was only the darn note I was playing! As I tuned the string, lights continued to move - red and green ones. Vertically and horizontally. Until...when it was spot in tune, there were just two bars of vertical green lights and a horizontal bar of green lights either side. Slightly off - even just the slightest turn of a machine head - and some red lights would appear *to one side of the bars*, showing if the note was now sharp or flat. Wow. Easy tuning...
I played another note - it again gave me the name of the note. I played an octave, to check for intonation of the E I had just tuned. Again - it gave me the name. Ever so slight red lights accompanying the green - indicating intonation would need a slight tweak. But I couldn't tell - it sounded great to me!
And wait for it.....if you play a chord...it will tell you the name of the chord (as long as it isn't too complicated). And - in this case, you get a couple of bars for Each. Of. The. Six. Strings. String in tune - green lights. Slightly out - red lights above or below the green. All six strings at once.
I really can't recommend this tuner enough. No more tuning woes. A permanent fixture, it is. Best 49 Euros I've ever spent on guitar related stuff. Who'd have thought it?
And when you're not using it - it just sits there, black as anything, like the stealthy tuning ninja it is.
Buy one you must.

Pros:
- It is much smaller than i thought, which is good for me.
- Tuning accuracy is excellent, even in polyphonic tuning
- Works for bass and guitar both
- Can change the reference frequency for the A

Cons:
- The # symbol on the screen is very tiny and dim and hard to see

Neutral:
- Polyphonic tuning is a bit weird at first and requires some getting used to
- No drop tuning support for polyphonic tuning. You need to tune in standard (or -1/-2 standard) and then tune the low string separately as needed