I just got my OpenFlash Tablet. I've tried Ecutek, and Unichip, and I must say from an end user ease of use prospective they are total crap compared to the OFT.
It's super easy to connect and upload a tune. There is a good and expanding assortment of tunes. Tune files aren't locked so you can share them, and the unit itself is married to a particular car but you flash back to stock you can un-marry it.
So far Vishnu's tunes seem to be top notch, but it sounds like anyone can tune with this platform with open source software.
I can't wait to burn through the half tank of gas I currently have so I can fill up with E85 and test out that tune
I'd highly suggest this to any of you looking for a tuning solution, and they are offering a $100 discount for those who already have EcuTek. You just need to provide a copy of your receipt and pic of your dongle.
Edit:
The realtime gauge display and data logging features are great and very easy to use.