I've been using Expandi and MeetAlfred for a few years and hoped for an LTD that might do most of that - problem I had initially with with LeadFWD is I couldn't tell what I could automate and what i couldn't. As I'm more familiar with the product here's what I'm seeing:

1. Does great with sending LinkedIn invites
2. AMAZING with email verification, email finder, and phone number finder.
3. Follow up messages after a connection invite is accepted is iffy. There's no way for the solution to know when the connection was accepted - so they might accept on Day 1 or Day 20. Hard to tell and you may lose the follow up touch. Instead, you might want to set it to send the initial invite and then set the follow up message in a separte campaign that you can just select and add people to. Not ideal but certainly workable.
4. Kevin is very responsive - and they seem to continue to add to the solution. I'm thinking I should have gotten an even higher tier!
5. When they go cloud-based, this is going to be unstoppable!