Hi Chris,
I used Livevol Securities for Interactive Brokers, before Lightspeed bought them (no pb for a user perspective).
I did it because I thought IB was not really user friendly, and I was looking for a front-end platform specifically designed for option traders.
The Livevol platform is definitely user friendly for option traders. If you want to trade Stocks with it, that is just fine but not great. The good thing is that you still can use TWS at the same time. I even used TWS, Multicharts and Livevol at the same time.
In my opinion, it is just a (nice) way to add a user friendly front-end to IB. If you are happy with TWS, you would probably not gain much using Livevol.
If you need to find and analyze trading opportunities, OptionVue is way more interesting and... way more expensive as well.
I always had a very nice experience with the Livevol SAV. If you have a specific issue, Livevol allows you to take a "picture" of a specific window, send it with comments directly to the techs, and they work on it ASAP and are always helpful.
Hope this helps.
Good trades!