The program converts EL to C++ which is the fastest language. It allows us to archive 20-50% advantage in calculation in majority of test cases.1. From reading on MC's website, it appears that MC converts EL to C # is this correct? Would seem to be a benefit as I have heard C # is faster the EL.
It is a rumor2. If I auto trade using MC can MC see my user name and accnt #? I ask because privacy is a concern and it was mentioned to me that MC may be able to see your strategy running on your desktop?

It is obvious that we care about our reputation and we are not interested in users scripts. So we help people using remote desktop (if they wish), but an user can see what we see/do and if he/she doesn't want to disclose something we will never insist.
What limitations are talking about? I need to know it to answer your question.3. I can't recall specifically, as it was some time ago I read this I believe by Gyles actually on another thread, but there was some limitations on TS for backtesting of futures. Does MC offer some backtesting for futures that TS doesn't offer?
We get data from TransAct. It seems it works ok now. We had some problems in the past when TransAct modified their API. I think the worst limitation of TransAct is a lack of history. I would use eSignal, IQfeed, IB or OpenTick.4. Does your connectivity to TransAct futures work well? Any bugs I should be aware of?