Best payment systems for your site?

Which payment system, shopping cart do you consider the best to set up a site where people can complete online reservations?

Thanks!

PayPal & AlertPay are the best ones I think...
I prefer those and others too so...

Greetz

What about Google Checkout?

For shopping I only use PayPal, as I have had no problems with them so far

PayPal because everyone uses it and all the credit cards I use are in it so I don't have to get them out/remember the numbers.

For me it is PayPal...

Mostly because users seem to me to be more comfortable with it. Most of my stuff is US and they have had zero probs so far for me.

Eric

I prefer paypal as I have got no problems using this for my online shopping ...

Thank you everyone for your advice, has any of you tried 2checkout yet?

I prefer Paypal, Moneybookers and 2checkout and I rarely used Google Checkout.
The safest and most secure, I must say 2CO.

2CO is a lot more expensive than other payment gateways.

The trade-off is that it's easier to setup.