1and1 have a few problems with dynamic php based shpping carts.

1. Their ssl set up is a little unusual and you may have to make a few edits to get their shared or full ssl to work with Zen Cart.

2. Their support is reported to be pretty slow to respond.

3. They offer massive amounts of bandwidth and webspace and can only do this by packing all servers to the gills. So there are lots of reports of slow page load times.

Vger