Unless they offer more features than they used to, Soluto just watches your startup programs to determine which ones are slowing you down. They basically make recommendations on which programs to remove from startup. Not a bad service overall.
Personally, I have used Soluto to see what's going on during startup, and then removed it after. They do provide certain services like the ability to move programs to and from your startup more easily than through Windows Explorer if you keep it installed though.
