Hi muncher,
Thanks for taking the time to post a reply and some feedback on your new BME mattress. At five weeks, you probably still have a bit of softening that will take place before having to decide if you want to make a change or not. If you’re interested, there is more about the most common symptoms/pains that people may experience when they sleep on a mattress and the most likely (although not the only) reasons for them in post #2 here .
I’m looking forward to your future updates.
Phoenix