I bought the PT-04 off ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=390205207494 earlier this year and haven't used them a ton. It took about 10 days to arrive from China.
My observations:
a) Feel cheaply made (all plastic) but has a metal thread insert in the hot shoe for attaching directly to a light stand.
b) No mis-fires yet but I've my flashes have been within 8 ft each time I've used them.
c) uses AAA batteries (I like this part)
d) I would buy them again, since I'm only a hobbyist.
Tim