I've used Ipage for 12 months and I did have about 6 clients with them however I've since moved on, basically I grew out of them, the server I was on was very slow and couldn't handle some software that I was trialling, plus there was an issue with the PHP version being out dated. Their customer service was pretty good though.
I would recommend them for micro sites and start up's but that's it.

I've used Siteground and have a few clients with them. They're great, inexpensive and can handle Wordpress, Drupal etc. The only thing that I don't like is that support is ticketed so no live chat.

I also use Site5 for some of my clients and find them to be outstanding and competitively priced.