I am a big flanger fan. I have a flanger in my guitar pedalboard that I love and when time was scarce and not enough to connect my pedalboard, so I had to plug directly into the amp, I missed having a dedicated flanger.
I found this before Christmas and, after liking what I heard online, I ordered one and liked it very much.
It's a cheap heavy pedal, but resistant and durable, it offers a good variety of sonic possibilities and it sounds good. It wouldn't replace my 8 ear old Neo Mistress but is a good substitute when I can't use it.
I mainly play Metal with lots of clean passages and I use flanger in most of those cleans, inspired mostly by Machine Head. I like to put it before the amp/distortion to smooth the effect and give a liquid vibe to some passages and, sometimes, to generate some chaos in long double note bends, sustaining notes or generating oscillating feedback, also like Machine Head.
It is not a perfect pedal, but to start using flanger or have a solid back up is a great value for the price!