FocalFury said:
I have the Strato II Multi and I highly recommend it. Great button layout, build quality, and reliability. Plus it comes in a package with all the different cables you may need.
+1,000,000
These are seriously amazing. They're cheap (compared to something like the PocketWizard PlusIII), but not so cheap that you can't trust their construction. The transmitter/receiver pair is ~$100 US, and individual receivers are ~$60.
Here's an example E-bay store that I would trust (Cameta Camera), or you can
order direct and wait for them to ship from Hong Kong.
The groups are done in a fantastic way. Set each receiver to a group (A,B,C,D) and on the transmitter, you have four buttons that let you turn each group on or off independently. For my own shooting (assistant photog at weddings) I set up 3 flashes on lightstands, each one set to a separate group. Usually, I turn them all on for full cross-lighting, but I can very quickly turn any of them off if they get in the way.
And a HUGE PLUS is that the transmitter's TTL passthrough works even when it's off. My own pattern has become E-TTL on-camera, manual flash off-camera, so this is a very big feature that not even the PocketWizard Mini or Flex have (you cannot fire the on-camera flash with the remote turned off).
Regarding range, Phottix's claim of 150 meters is somewhat believable in my testing. I put a receiver on a lightstand by my house and walked down the street until it stopped firing consistently. I then went on Google Earth and measured the distance to just about 150 meters where it fired ~80% of the time. At 100-125 meters, it fired 100%. I do not own a flash that could do anything significant at 100 meters, but if you're doing outdoor portraits with a very long lens, this distance might be useful.
So yes, get the Strato II's. You won't be disappointed.
EDIT: Obviously, the OP already has this information, but I can say from experience that all these features of the Strato II are accurate and very useful. I've never looked at the Aster's but I would have a very hard time recommending anything but the Strato II. They're that good.