I have promoted all the merchants mentioned in this thread and a couple of others - these are my experiences:
Streets Online - have been an affiliate for 2 years, reporting is awful, but from what has been tracked my commission for the past 2 years is £253.53. However, despite passing their very high (£100) miimum earnings before payment barrier ages ago, I have still not been paid anything by them ever!!
E-mails, to them are not answered. This seems a bit odd because my experience of them as a customer has been good.
Jungle - my experience of them as a customer has been awful. Ordered a printer which arrived with an american lead instead of a UK one - literally dozens of emails to Jungle asking for the correct one and at first they replied saying it was in the post, then they just ignored the e-mails. Eventually, I emailed the printer manufacturer and the correct cable arrived in the post the next morning! 2 months with no printer though thanks to Jungle, so no way
am I risking my reputation by putting them on my site. I know lots of other people who have also had customer service problems with Jungle too.
Tower Records - I agree with the comments made by JF - I have yet to make a sale with Tower Records.
WH Smith - as a customer they have been very slow to deliver, as an affiliate programme average at best, conversion ratio is quite low.
Countrybookshop - either their tracking does not work at all, or they do not convert - have not made one sale through them and therefore removed them from my site.
JustBooks (2nd hand books) - just started to promote this (via CJ). Has potential as a similar american site (alibris) has a good EPC on CJ and I have also done quite well with Half.com on a site with usa visitors.
Amazon - seldom the cheapest due to high postage charges, but their customer service is excellent and they are widely recognised as a brand name. Not the best earner as you mostly get 5%, but at least you can recommend them with some confidence and their site is a model of usability.
Other options - Bensons World is pretty good for Dvds/Videos (Tradedoubler) and Blackstar is good too, because they pay lifetime commissions. Their customer service is good but their prices are not particularly competitive.
On a side note - the Simpsons box set is much cheaper on Region 1 (if your player is multiregion), Play247.com has it for £17,99 with free postage, for example, but unfortunately they do not have an affiliate programme.
Mark.
clickprofits.cjb.net
Affiliate Program Reviews.