Ganceann - 11:03 am on Feb 13, 2008 (gmt 0)

I haven't used GC yet, but I fully intend to use it when I have a site that is eCommerce driven, not just because it is Google, but it offers an additional method of payment.

There are some definite improvements required:

1. Recurring Billing
2. eCommerce sites should ALWAYS be able to get their customer email address - it is a matter of good customer service and follow-ups to do so.
3. Integration process will hopefully become more straightforward (currently never experienced it, but if veteran webmasters are saying it can be awkward, then it needs to be improved).

There are likely several other things that need improvement or refined and those may well come over time. However, NO payment processor is going to be the Paypal killer due to the first mover advantage that enabled Paypal to grab such a huge market share.

It does provide competition and if processing/transaction fees are more competitive than Paypal, it will eventually grab more market share when webmasters grow more frustrated with Paypal.