We tried that Rainbird hose product that weeps every 12" or 18". It was lousy. Very inconsistent watering pattern along the length. Watered much heavier on the inlet end - and even lowering the pressure didn't help equalize the pattern.
I'll post pics later - we used the Rainbird 1/2" solid hose with the 1/4" flexible line and drippers in our garden. We've been very happy with the results. The drippers come in multiple variations - we used the 2 GPH on tomatoes and 1 GPH on the pepper plants. An automatic timer makes it labor free once installed and set up.
Edit - remembered I've already posted pictures of the garden. On this thread below you can see the black 1/2" line with multiple drippers connected via the 1/4" flex hoses.
http://forums.pelicanparts.com/off-topic-discussions/1119361-2022-vegetable-garden.html