I'll make this quick: Temp to Direct is a bad choice. It's a "we really want to hire someone, I think, but it would be great if we didn't have to make a firm decision - so let's roll a few unemployed people through here and see if someone knocks it out of the park."
Dear Client - here are your choices: Unemployed people who have no other choice or contractors who will happily "pretend" they "may" be interested in a full time role.
Contractors contract. Full time people like "full time" positions.
If you are telling me you want someone who will accept a full time role, then most likely you're going to be sorting through the unemployed crowd. Not that there's anything wrong with that.......but you don't really think a professional, gainfully employed, is going to roll the dice on a 90-day contract do you? Seriously?
"Try before you buy" is good for some products I guess. Cars. Job Boards. McAfee softare. That kind of product doesn't really have a choice. But people do - and if you want to HIRE the best - then HIRE the best! While "temp to direct" might be the easiest way to sneed a recruiting fee into the budget - you're not "sneeking" a top, full time player onto the team.