Thanks all for the comments guys.
There are a few factors that are undoubtedly making rhe IMC rating easier and some that are making it harder in my particular case. In no particular order:
Helping
Flew 30 hours in last year, 27 of which were in the exact aircraft I am doing the IMC in - as close to current on type as I can get!
Same instructor as for my PPL and conversion onto PA28.
Getting on well with instructor.
Same airfield as my PPL.
Previous instrument training (all be it some years ago

) courtesy of the Royal Navy, including NDB let downs, PAR's and SRA's.
Well equiped aircraft.
Desire.
Ex-Royal Navy Observer so used to no view out of the window.
Hindering
Lack of continuity - only 1 hour per week.
Motion sickness (life long hinderance).
Only 75 ours total light aircraft experience.
Studying for ATPL's at same time.
IO540, I agree with many of your sentiments, but would add that it is more important to do instrument training in say a well equipped C150/152 than a poorley equipped C182. In otherwords, the fit is more important than the airframe, but ideally you would be best with a nice stable easy to fly airframe with a good fit. IMHO
I'm off to read up on NDB's now.....
Obs cop