Real-world Force10 opinions?

Can anyone offer any real-world Force10 E-series opinions? L3, 10GE, GE, POS, BGP, and IS-IS is what we will be evaluating them for. Any opinions, gotchas or other advice would be appreciated. Looking through the archives, I see that there have a been a few similar questions in the past year or two, but no replies. I can summarize to the list if others are interested. thanks bill