Architect Mies van der Rohe is often credited with saying "Less is more" and I suspect he would have approved of this understated but elegant solution to the design of a coffee table. His own Barcelona table is an icon, but this table stands on its own - entirely constructed of a single sheet of tempered glass. It's priced well, arrives well-packaged and there's no assembly whatsoever. A single, simple brilliant statement that works well with contemporary furniture, modern classics, or well-curated antiques. 

Pros: As durable and straightforward as any product is ever going to be!
Cons: There are no cons, unless you happen to be allergic to glass.