Rock Solid Platform
I've been using GetResponse for about 5 years now, so I know it inside and out. The main thing I'm impressed with is how good the UX is. It's very easy to use without sacrificing power and heft. I've used plenty of other platforms, including AWeber and Constant Contact. But Get Response beats them all. Also, their newsletter is one of the few newsletters that I actually read top to bottom. They have great insights about digital marketing and always keep me at the forefront of that topic. Overall, I give them a big thumbs up.