I am a constant user of Spark messaging over the past year or so. What I love about this type of messaging (compared to IM/P), is that my conversations include two important groups that are absent from IM/P chats. 1. People that are not "present" (which basically means active of their computer at the time I want to ask a question. So many of my peers are busy running from meeting to meeting and traveling that they are "offline". But, with Spark, they stay connected when mobile...nearly all the time, and they respond and I get the answers or guidance I need quickly from my mobile peers. 2. Spark is available to everyone inside my organization and everyone outside my organization too, and in addition to my peers that aren't sitting on their desktop, but are nearly always available on their mobile and are open to "mobile text messaging"; I can reach anyone outside my organization too. This includes business partners and customers, and personal contacts too. All the people I couldn't reach with IM, important and useful people, are now available all the time. It really helps me stay connected. I've always been able to have meetings with anyone anywhere, and now I have the same messaging access. It is awesome.