alza got alot of problem compare to myvi ? i'm still thinking which one to buy whats your advise bro?

Now i'm considering buying the new myvi but just now my fren say if i need space i need Alza. but just afraid alza give alot problem just because it still new in the market. And normally 2nd generation car they would have fix most of the problem (i assume the new myvi ) in need of your expert advice thanks