I'm trying. I have Helium on phone and desktop (Win XP), installed drivers, phone connected as PTP, but phone (system) won't detect an application to connect to (asks for SP3, WM 10, etc), Helium on phone and desktop don't detect each other.
It must be a driver issue, so despite having installed the Samsung drivers linked at Clockwork Mod's page, I'm installing Kies now to see if that helps (it's the only way I found to get drivers from Samsung for the S4).
I hope that does the trick. Or else I might have to try Windows Media Player 10 as well, and see if that somehow makes any difference.
I'm looking forward to get this going. I don't plan rooting my phone right now, as I'm waiting at least for the OTA updated from Samsung to install apps to the SD. No root, no Titanium Backup, so I need another tool. Helium is it.