I came from an Eris, and the signal "indicator" is right about where it was with my Eris (maybe a little lower at times). I have not had a single dropped call or garbled conversation with my DInc2, where i did on occasion with my Eris. I have never followed my dBm level closely so I can't tell you that.
I have heard others that came from the Eris say the DInc2 is like a perfected Eris, and I agree. I love my DInc2.
It does however have a weak external speaker and a weak vibrate like my Eris did. The battery life is better (on custom ROMs at least), No trackball to break, etc etc.
Get it. If you aren't sold on it within you trial time, trade it out for something else. I bet you won't find anything better in an all around solid and tried and true tech way.
Enjoy!