My copy of the 2011 edition arrived 3 days ago and I'm off to South America tomorrow.
I was very impressed with the price, especially considering it is a hardback.
I went for the Footprint series, as opposed to LP or Rough guide, based on previous experience in South America. I had an up to date (2009) Footprint for Ecuador, and an old second hand one for Peru, and both served me very well. Compare that to the old LP Colombia book... written by a guy who didn't leave Bogota. I tossed it, and just travelled by word of mouth.
It's pretty compact for such a comprehensive book... very thin paper, which shouldn't be a problem with the hardback cover. Looking fwd to seeing how well it copes in my bag for 2 months.
The content looks good... comparing with my previous experience. What you'd expect from Footprints guide.
HOWEVER, on closer inspection... there are pages missing. Pages 49 - 80 are missing! That covers the end of the Essentials A-Z, and the beginning of the Argentina / Buenos Aires section... including the maps. Bugger. This may be a problem for some... (I'll get a map online, and use the website, might try and find a pdf version). I'm not sure if this is why the very reduced price, or if it is a problem with just my copy, but be warned!
I took 1 star off for the missing pages. Forewarned, it shouldn't be much of a problem. It's still better than 'rival' guides, and way more up to date.