Sounds possibly competitive with OSHPark.
OSHPark is $5 USD per square inch compared with AUD $5 at BreadboardKiller (for something basically similar - 3x boards, including shipping) - so BK is slightly cheaper.
But OSHPark does beautiful purple. BK does not specify anything about soldermask colors - what do you get? I assume it's just boring green?
What plating do you get? OSHPark does ENIG, will they match that or just offer inferior HASL? If it is HASL is it Pb or Pb-free?
OSHPark usually takes about 4 weeks to totally turn around from order to mailbox for me, in Melbourne, if you choose free shipping.
Hopefully BK will offer Australian users faster turn around than that.
OSHPark gives you a very easy, fast, no-fuss online ordering process, and it remains to be seen if BK offers comparable ease of use.
BK offers 12 thou minimum drill, compared to 13 thou at OSHPark, which is nice.
BK specify nicely routed board edges, with no ugly break-away tabs, which is nice. However I'm not sure if they will add printed ID codes onto your board silkscreen, which OSHPark does not.
OSHPark does 4-layer boards as well as 2-layer. BK does not seem to offer anything >2 layer. OSHPark provides the stackup information (copper thickness, dielectric thickness for each layer, and dielectric constant) with as much confidence as is practical, which is important for RF designs.
http://blog.oshpark.com/kb/4-layer-stackup/ Does BK provide this information, or do we have to roughly estimate it?