I've been with 1&1 for a few years. They've been through some bad times, but the last 12 months have been pretty good, so pretty happy with sticking with them myself. Access to the MySQL server cluster did keep breaking about 12 months ago which was a pain for my forum, but I've never had downtime for my raw HTML sites.
You can do basic ecommerce with most (?all) hosting packages if you have less than 10 products, not tried it myself though as I sell via SWreg.
You can do basic ecommerce with most (?all) hosting packages if you have less than 10 products, not tried it myself though as I sell via SWreg.