You may want to check the manga to know where you should place your expectation
. Saki requires a lot of Mahjong knowledge first hand to be able to follow the manga (sometimes I have to read a sentence 3 or 4 times to understand what are they talking about), and large amount of suspended belief to enjoy it because, well, Saki's devil luck (although she has skill, and quite good, but how did she come to her winning hand is hard to believe).
But what can I say? Over the top action and reaction from various kind of cute girls and lolis are enough to make me enjoyed it.
There is one thing I like about the manga is how they handle the "overwhelming" battle, or you can say, "grunt owning" battle. The manga doesn't waste time for such battles, instead they are used as stage for showing briefly how each member plays their games (like, some match only last 3 pages XD). To me, the main show begins when they reach the final (vol.2 onward).