The best part is that it's free! You can create different landing pages in one account so if I want more traffic or conversions from my email campaigns then all these will be under same page - no need to go back & forth between accounts anymore!! It took me some time to get used but once we started using this tool everything was just fine :) Sometimes when there were too many emails sent at least 30 per day within 10 days (which could have been avoided) our website would crash due to server overload. This has never happened before since they've introduced their API integration feature recently which helped us solve such issues easily via CORS headers configuration etc., But now again after implementing XFBML tags instead of FBJS SDK its solved as well :). Try out first without any expectations otherwise things like above won't help much ;) They offer both standard plans where only 20k messages/.