I'm generally loving the relaunch. After I get through my big pile of Marvel, the Valiant books are next in my monthly to-read pile. Ahead of anything from Image, Dark Horse, DC, Boom, etc...
There are only 5 ongoings so far and one current mini-series, Harbinger Wars, which is a Bloodshot/Harbinger crossover.
You can see everything they've put out by searching Valiant Entertainment
in the publisher field (or just clicking the link there).
I've been reading them all since the relaunch. In order from my best to worst...
Archer & Armstrong (10 issues to date, including a #0)
-Easily my favorite. There's a ton going on in this book with four lead characters, multiple villainous organizations and a ton of Valiant history being laid out. Great characterization despite the large cast.
X-O Manowar (13 issues to date)
-A close second. Knocked mostly for being a bit too slow paced. Each issue is action packed with plenty happening, but I think #4-13 have covered about three days so far. Just not enough forward momentum for my taste.
Shadowman (7 issues to date, including a #0)
-The newest Valiant title. Gorgeous art from Patrick Zircher makes this an easy pick up. The story is interesting, but a bit of a slow build.
Bloodshot (11 issues to date)
-Early on this was a favorite, but it's gotten a bit too convoluted and perhaps too much work to follow all the conspiracy and detail. Not bad, but not as good lately as the first few issues.
Harbinger (13 issues to date, including a #0)
-Bringing up the rear by a significant difference. Although, it seems that people either love or loathe this book. I've never been able to click with Joshua Dysart's writing (on this or any book). He always seems to be trying way too hard to be moody and angsty. The big idea is an interesting one, but I generally find it a chore to get through each issue.
Coming up this later year is Quantum & Woody, Eternal Warrior, Rai (maybe?) and Unity.