Yes I'm using a TWEECER and am satisfied with the system. More importantly I'm using Binary Editor and EEC Analyzer from Clint Garrity for software to adjust and analyze the system. The software that comes with the TWEECER is a very basic program that has far less capacity for tuning than BE and EECA. BE and EECA also have a quite extensive online support forum at:
http://eectuning.org/forums/viewforum.php?f=7
One caveat is that "if I knew then what I know now" I probably would have gone with a Moates Quarter Horse unit instead of the TWEECER. The QH allows more parameters to be data logged in BE and EECA and allows for "Tune on the Fly" adjustments. The QH also has a couple of features that the TWEECER does not. On the flip side the TWEECER is a plug and play unit whereas the QH needs to be installed in the EEC internally. The internal installation is about a 15 minute job if you have the screw driver bits necessary to open up the EEC (I do so it isn't a problem other than having to dismount the EEC to install the QH).
Regardless of which system is used I can't praise highly enough the BE and EECA programs for tuning. They cost about $80.00 for the two of them and have easily payed for themselves many times over in ease of use.
To your original question, it sounds like the EEC is doing what it's programmed to do. In my opinion the only thing you might want to change is the slope of the advance to slow it down a bit but not necessarily a whole bunch. You could also lower the idle timing by a couple of degrees which will probably drop the idle rpm slightly.
DonC