I use to use aweber awhile back, but a couple of years ago I decided to host my own list with ListMailPro software and love it. I know a lot of people use aweber and are very happy with it, so you should get some opinions from their current members. But I should also tell you I have also been seeing a few of complaints as of late on warriorforum about aweber.

With ListMailPro I have complete control, I can set it up on as many websites as I want, send as often as I want, customize just about anything I can think of, and there are no future fees or charges.

I guess one thing you should consider is if your current hosting solution can support mailing your list size. I have my own server, so it’s really no big deal, but if you’re on shared hosting you may want to check with them before installing something like this.