Hello Bella Lucia,
well I'm back sooner than expected.
My 85 year old Mother is in good hands, with regular visits from myself and my brother. It's a relief, and a weight off my shoulders to know that she is well cared for, and the practicalities of living alone have been taken care of.....bills to pay etc etc...
I think I'm a good listener, so we all help each other with the loss of my father which has been an unbelievably quick six months !!!
In answer to your question Bella, I would think you are right: the back pain you experienced was most likely caused by a cheap version of the rebounder. There is a soft-rebounder on the market by a company named Needak (I think). I use the Reebok rebounder which is excellent quality and far less expensive.
Rebounding needs to be very gentle to begin with, to acclimatise your body to the forces of acceleration/deceleration/gravity, so to start, I would bounce gently so that your feet do not even leave the mat. Then work progressively from there to a slightly higher bounce with your feet only just leaving the mat and so on.....
So I would give it another chance, but leave it awhile for your back to re-heal: say seven days or so would be a reasonable time-frame.