I've been watching Sengoku Collection since it came out, and I really like it. Most of the stories are really nice and fun to watch. For those who care, some of the characters are voiced by the same people as some iM@S characters.
The newest episode, 18, was very different from the rest. The rest is in spoilers because it might be a bit spoilerish.
It takes place in Europe, and not Japan, unlike every other episode. Also, the backgrounds are very artistic, and seem to have been painted or drawn with pastels. I'm not exactly sure what to call the art style. It is also the most depressing episode of any show I have ever seen (I haven't seen Clannad). I was expecting it to have a happy ending like almost every other episode, but this one was actually quite different. I'm normally a very positive person who can somehow see a positive side to pretty much anything, but I honestly don't see any silver lining in this story.
For anyone who likes touching or fun anime, I highly suggest watching this show. Even if you don't like some episodes, there is likely going to be at least one that you do like.