The main weakness I see is the price-point where small companies are concerned. If you don’t need all of AWeber’s bells and whistles, there’s no reason to pay for them. You’ll also want to make certain that if you are trying to cancel your account, you’re not just accidentally suspending it. This is especially important where the free trial is concerned, as AWeber requires your credit card info.
Unsubscribe rate. Unsubscribes are always going to happen no matter what, and that’s usually OK because those people probably would never have bought from you anyway. However, a high unsubscribe rate can indicate that you are losing potential customers. Check the following: Why did people subscribe to your list in the first place, and are you delivering on that promise? Is the content of your autoresponder highly relevant to the segment it is being sent to? Are you sending too many sales emails with too little value emails? (Recommended reading: 5 Reasons Why People Unsubscribe from Your Email List.)
Using the Personalize dropdown, you can insert custom snippets like your subscribers first name, or sign up date, and AWeber will automatically insert that data specific to each subscriber if we have it. If you collect first name, for example, you can send an email that says Hello Tom, or Hello Mary, or Hello John, depending upon who you’re sending to.