Let me start by saying I used to play BP back in the day so I'm not totally a newbie but getting back into it via 2nd Edition is proving a pain.
Since my previous time with it there have been three Napoleonic supplements (thankfully all written by the same person) and now the new edition has its own alterations.
There are new rules suggestions in all three supplements (by far the most in the last one – Clash of Eagles) the majority of which a well worth adding to the basic game and then of course there are some "advanced" additions in the rules themselves.
Playing the Peninsular War I have swerved Albion Triumphant – Waterloo but this still means looking at three books to check on a particular item as you learn and to cap it all the two supplements AT-P and CoE are cross referenced to the original BP pages being written and published prior to the 2nd Edition.
Further more I noted elsewhere people getting excited about the 2nd Edition have an Index – what a joke that turns out to be! Many Items have 15 to 20 page numbers listed and some 25 – 30. Some entries are linked to just a couple of lines of text which in turn direct you to another page that's also in the list for the actual explanation!
Its better than having no index but in some places you end up looking through the entire rules section of the book any way!
Not to mention the fact that to get the ultimate rules experience of BP as a Napoleonic set you end up buying a something that cost £76.00 GBP!
Yes, I appreciate there's more to each book than just the playing rules but as they can't be separated out, if you want the rules that's the price!
I happen to think the rules in total will be a good set at what they do but I also think the inconvenience, marketing and price sucks!