I still wear Tena "Slips" and use the green or Purple ones Medium and Maximum absorbancy and find them adequate, like all Nappies they are not perfect and if over worn will leak
As one member has already stated the newer Tena Nappies are sometimes a lot thinner (seems to vary with delivery) but you can ocassionaly get a Purple Maxi that is as thin as a Green Medium and whilst I have no idea how my butt looks when out and about I have encountered no problems other than my own self consciousness at walking around well padded up.
nother observation is that the newer thinner Nappies do seem to cope a lot better with more liquid than the older ones as they contain a lot more of the plastic polymers that do the absorbing, I have had to keep one Purple Maxi Nappy on for a whole day as I had nowhere to change and it just about lasted out with me feeling the leg cuffs getting decidedly damp but no actual leaks.
The only other Nappies I have tried were all excepting one inferior so I will stick with my Tena Slips thank you.