I've used them all and even got obscure UK titles from Camsco that I'd not been able to source from UK, also often much quicker! Even though CDNow has a European warehouse some stuff is still sourced from US and UK Customs slap on duty and VAT which the UK post office then charge you for dealing with which can add considerably to the total package. I've also never managed to actually get anything from Tower Records (UK).Although their inventory often lists things that don't appear elsewhere, after months they are always "unobtainable" which suggests they don't clean up their database when things go out of print (I've tried them with jazz, pop, blues and folk orders). Camsco and Folk Legacy deliver the excellent personal service we would expect from Wally (and now Dick) and Sandy.
I'm clearing my Santa wants list now of the things I asked for and didn't get, so the Mudcat should get some spin-off cash soon!
As my local shopping centre only has the mass market chain shops with poor jazz, blues & folk stock these online sites are a boon.
Now I have to order another CD rack!
RtS