Main problem with Samumenco's first episode is... that nothing really happens. It's just a very basic setup, I can't tell what I should expect from this series yet so I'm holding on it. I'm looking at the main cast and we've only seen 2 of them, I can't really tell how one can claim they love it or hate it based on this first episode unless you really really dig certain themes presented like being a super hero?... it's just about two people meeting for the first time.
One episode is just too little to judge it, same goes for other seemingly premature and too harsh impressions I'm seeing for other shows.
Going to stick with "3-episode rule" on this one. Some series do have a strong first impression and you can tell what you're in for just from 1 episode. Like Kill la Kill and Gundam Build Fighters, you either like it or don't and it's obvious what's it about. I can't say the same thing about Samurai Flamenco, there is just too little yet, if that makes it a poor first episode I don't know. I wasn't bored watching it but I'm not terribly excited about it either.