I'm a sympathizer. They're not perfect, and I think I'd tend to agree more with the positions of the ICT or ICP, but I still agree with them overall. Also, check your email.
I did accept his position completely, but I think it's a little more complicated than Ticktin makes it. Towards the end of the Stalinist period I tend to agree with Bordiga that the Soviet Union was an "emerging" capitalism rather than a non-mode of production.