I'll be honest. I've been a major advocate of Paizo since taking over the magazine. I think most of the changes they've made have been good, either from a business perspective or the perspective of someone who just enjoys the content. In keeping with the honesty, issue 99 wasn't my favorite issue of all time. I didn't love the mini-game like I've loved the others in the past. I have a subscription, so it isn't like I can choose not to buy one I don't like.
On the other hand, I normally love the mini-games. I also normally like the adventures they run, and I do think the format change is cool. A monthly dose of Dungeon beats a magazine of the same size as one of these bimonthly ones. I will be resubscribing based on the fact that it normally is worth every cent spent on it, and then some. I can forgive an off-month. I can also understand why the last 1 or 2 before a major milestone might not be so great. They have to save the cool stuff for the big milestone.
Which brings us to issue 100. This is quite possibly the best issue of Dungeon ever. My good friend Flame returns (finally and again) in Old Embers Never Die. We have Incursion, which is one of the coolest things to hit both mags in a while. Actually CP told me about it months ago, so it wasn't a surprise when I saw the buildup for it, but its still cool nonetheless, and then we have a number of other cool features, including the "mini-game," which is effectively closer to a 40 page write-up on the githyanki. Lets also note that this issue is the same size as the magazine was before it went monthly, and still only $6.99.
All in all, I have no room to complain and am very pleased with the magazine overall.