I've been to a lot of computer stores in Brisbane over the years - Sunlit, Concorde, the horrific original saturday morning queue for Gamedude, the exciting Discshop, when you could browse for what you wanted. Without question, Computer Alliance is my preferred destination of them all. Umart is often slightly cheaper - but, location and Sunday operating hours give them edge. That being said, I'm 100% sure that there will be negative reviews on here, from time to time, from less patient people who are exasperated by how busy this store is. Granted, I tend to visit in peak hours - but it seems to me that the staff rarely get a moments rest and I often see people displaying less than stellar patience at this.

Criticisms (minor):
I agree with someone saying they can take a long time to find a product from the back.
I do not agree with their stipulation that if you pay via paypal, you must have it posted.
If I were them, I would consider reworking the store to make the queue / customer service area just a tad bit more spacious. It can get quite cramped in that queue. Half the store, the laptop area has better space - yet it is rarely the "traffic" area.