The premise is very, very close to the recently-canceled Christian Slater vehicle, My Own Worst Enemy -- without the promise of that show's continually-evolving character dynamic, and the wonderful interaction (via cell-hone video messages) between Slater's two personas.
Yes, everyone's sure that the Dollhouse story arc will involve the system breaking down, and "Echo" slowly retaining memories between downloads. Enemy started with the breakdown, dropping you right into the middle of things as poor schlub Henry finds himself in the middle of his super-spy alter-ego's anarchic existence.
Please note that I was somewhat "meh" about Dollhouse's premise even before I'd started watching Enemy.
quelonzia and I will give Dollhouse a try, but I may find myself in the unlikely position of wishing I was watching Christian Slater instead of Eliza Dushku.
Yes, I know, after snarking on the shows we DROPPED, I never got around to posting about the new shows we LIKED this season. And now one of them's gone.