I'm looking for a good spreadsheet app, and it looks like Apple's "Numbers" app is the way to go. Before I plunk down $10 for an app, though, I wanted to ask if anyone knew of any other spreadsheet apps that work wel, or had experience with Numbersl. I'm a little nervous about buying a $10 app that only has a 3.5 star rating. There are a number of complaints among the first few reviews; are any of them legit? Thanks in advance.