I have 2 different control boxed from different manufacturers. The 2B is by far engineered and constructed with higher quality than the other unit.
I like all the different modes but dislike that when one switches to a different mode one must reset the speed and 'feel' of the pulse. Why not leave it where the user has it set and prefers, electrically reset the intensity to zero, and then allow the user to gently increase the intensity to a comfortable level?
Have to admit I probably only have 20 sessions under my belt (pardon the pun) and learn new stuff each session.
ED:Thank yo for your comments, the reason for not keeping the feel setting across other modes is that different modes have different feels and so they are not consistent across the various modes and so it would not necessarily feel the same.