I have the new, slightly thicker version. I much prefer it to the original - it fits much more comfortably (I re-moulded my old one loads so am confident that this is becasue of the new design, not becasue my old one was badly moulded). You are welcome to look at it, or touch it even if you catch me at the start of the session before it goes in my mouth
I had to trim both of mine to get a good fit - I find they are too long/wide? and make me gag.