The short bad: Metroid: Other M sucks story wise for shoehorning everything onto a hour long movie that tries to Moe (and shrink) Samus. The short good: Metroid: Other M provides beautiful visuals in a quasi-sci-fi adventure that does very little to settle suspension of disbelief (which, honestly, no Metroid game since the first has done much to do) while focusing less on combat (which never was the core point of Metroid games anyways (against what Prime fans believe)).
Change Samus' name or place it in a parallel universe in the game and it would be an okay Gaiden; of course, I'd have to say the same thing about the Prime games as well given "Phazon" and the same for Metroid Fusion and "X Parasites". But the two major reasons to not buy Metroid: Other M are (1) being unable to stomach sitting through 1 hour of non-sense, unskippable video (of which you'll have to pass on a LOT of games over that point, if you actually pay any real attention to the point) or (2) if you're so flustered about how Metroid: Other M has totally ruined the franchise.
Me, I basically accept (1) as a sad fact of where games have gone and as for (2), well, I'd say we'd probably be better off with a fresh start on a whole new franchise anyways*. After all, the titular enemy of the series is the Metroid and they've played second billing as a threat since Metroid 2. Hell, Prime turned them into a nuisance (except for the Phazon versions) and all the focus on cloning...well, whatever. They really lost their threat factor long ago compared to all sorts of other Metroid universe monsters.
That's my two cents, anyways.
*PS - Unless they want to actually show Samus in her early missions. You know, the whole "[Samus Aran] is the greatest of all the space hunters and has successfully completed numerous missions that everybody thought were absolutely impossible" and not the "Zero Mission" crap.
But I can only imagine "Yoshio Sakamoto" turning that into a "Star Trek" reboot--an idea that was kicked around for as early back as 1991 and probably a lot earlier. So, first things first: reassign Yoshio Sakamoto.