New Cubmaster here - re-starting a defunct Pack. I took several hours over the summer to look for the best tool, and chose SOAR.
Echo all the comments above - automatically-updated email lists is a godsend, setting up sign-ups for an event is easy, and making online payments via PayPal connected to the event is great.
I've had several instances of difficulty (one email list not working correctly, another different issue in terms of incomplete documentation) but the email (and even telephone!) support has been great - a complete reply within 4-8 hours.
Before that I tried the free Google Sites / other Google resources, and there's no comparison in terms of time, hassle, flexibility, and fit-for-purpose.