The ability for me as an IT Professional who has been working with computers all my life (I started using them when I was 3 years old) it's very easy! It makes finding new clients so much easier than searching through LinkedIn and other networking sites out there today. There are also several templates available which make creating emails quick & painless - saving time over having each client create their own individualized template from scratch every single day they use this service!! Nothing really- just get yourself some training first if needed but don't worry about being overwhelmed by how many options exist within iLeads.