Most universities recommend this for 1st year undergraduates, probably rightly. Varian is quite clear with intuitive explanations of the basic concepts. However in terms of the maths he becomes incredibly confusing, as he insists on relegating all calculus (which is vital to even 1st year micro) to appendices and using deltas (aka triangles) in the main text. This has three consequences. Firstly it makes his reasoning less rigorous. Secondly he doesn't really explain how the calculus relates to the intuitive concepts or present the mathematical steps in too much detail, so it is often difficult to follow. Thirdly you have to spend a lot of time piecing together proofs from triangles and actual partial derivatives if you want to make use of a proof for an essay or exercise. Some of my friends used the Perloff text (I think it's called microeconomic theory and applications of calculus or something like that) instead, and claimed it was better. I used Varian in first year and got a first in micro, but had to rely on my maths for economists textbook a lot. Definitely too basic for finalists.