Advice on Buying a Pack

First, consider borrowing a pack instead of buying

Chose the right fit

Is the pack 'well-designed'?

Solid construction?

Is there sufficient storage space?

Are there enough places to hide stuff?

Are there places for two quarts of water?

Does the pack weigh less than 6 pounds (preferably about 4 lbs)?

How water-proof is the pack?

Extras?

Does it cost between $75-$175?

Bibliography (taken from):