  The interpretation of static and dynamic scattering experiments on droplet
microemulsions is discussed. We review the arguments given in our previous
papers that call into question the methods of current determination of basic
phenomenological characteristics of the droplet surfactant monolayer, such as
the bending and Gaussian rigidities. We give also responses to our criticism by
T. Hellweg, B. Farago, M. Gradzielski, D. Langevin, and S. Safran (Colloids and
Surfaces A 221 (2003) 257 and some other works by these authors). They agree
with some of our objections; the rest of their response is shown to be flawed.
We also show that in many points their way of discussion is improper and
misleading. It is concluded that the values of the parameters of microemulsion
droplets, as extracted in their experiments, are not reliable and should be
reexamined.
