Seriously, just my personal notes not anything like a review.
I am not blown away by Gabriel Seth. He's not bad by any stretch of the imagination but considering that there are no sub-faction rules in this book I was hoping he would do a bit more to impart some Flesh Tearers character to my army. As it is he has a cool but intensely situational rule that gives a slim chance nearby units might get a second combat round in (it goes off on a 6 on units within 6”) and the usual 6” AoE effect allowing Flesh Tearers units to re-roll to hit.
Blood Reaver, his chuff off massive chainsword, is suitably nasty at Strength 8, AP -2 for 3 Damage and inflicting an additional hit for every hit roll of 6 (and Seth has 4 Attacks so that's good odds).
(By the way, there's a perfectly needless note about unique characters I encourage everyone to ignore about how, for instance, Dante is the Blood Angels Chapter-Master and no one else's so you can't change his or anyone's Blood Angels keyword to be used as another chapter's Chapter-Master. As I say, I'd encourage people to ignore this for the simple reason that there isn't another Chapter-Master profile other than Seth you can use if you want, say, field the Blood Drinkers with their Chapter-Master).
There is also a non-Primaris profile for Lieutenants which is useful for someone playing the perpetually under-manned Flesh Tearers. It makes sense they'd have people leading strike forces who aren't as senior as Captains (of which I think they had four at last count).
Should I ever want to use Primaris Marines (I'm not currently that interested) the Blood Angels get access to the full range. Of more interest to me is the fact that they have access to a lot more armour as they gain Land Speeder Storms, Hunters, Stalkers, Stormhawk Interceptors and Stormtalon Gunships. The fliers and the Storm interest me the most as someone who wants to theme his army around mobility rather than static firebases. I really want a Stormhawk.
That's about it. As I say there are no sub-faction rules so Seth really is the only Flesh Tearers representation the Codex provides. There are some nice pieces of Flesh Tearers art including a picture of a Rhino that almost sells me on that mostly black colour scheme. I might event try it on my Vindicator.