Lenovi K3 Note according to me is a good budget smartphone. As its features states, it has a 13 mp rear and 5 mp front camera and it performs very well in my opinion but if we will compare its camera with Xiaomi Mi4i which is also smartphone around this budget, Mi4i gets better from it. Also as mentioned in features it has an octa-core 1.7 ghz processor, I noticed very few lags at sometimes.
On the other hand, if we talk about its Android L version, it performs very well and it UI looks classy too. And if talk about its sound, then we can say that its sound is very good and the Dolby Atmos feature added in it gives a boost to its sound.
Thanks : )