Glad it worked for you too Mine showed plenty of faults the first time, but after taking the car for a long run, the faults miraculously disappeared! Sorry to hear it's stuck in the port. I had no such problem and cannot advise whether it will flatten your battery or not. I'm sure some gentle tugging will release itCheers! Got one - tried it today and it does indeed reset the service spanner. Cheers!
I also had a record number of faults - 11! To be fair 5 due to TPMS and 2 due to a failed parking sensor (told me which one it is - bonus!) but also lots of spurious ones about under volt in passenger door mirror which works perfectly, battery under voltage which TBF is probs true cos I'm hardly using car.
Issue I have is I can't get it off the socket now! So I've left it in there - now last time I did that with my previous car it flattened the battery over weekend but it was 2014 - perhaps they consume less power now? So, any issues?