You cant highlight text
This app works pretty well, and Im tempted to buy a Safari subscription (Im currently half-way through my 10-day trial), but only the online browser viewer, built for Flash, allows for highlighting text. In my case, highlighting is a critical task while reading technical books, and I could cope with being unable to highlight text while using the iPad if only I could see the highlights created via my desktop browser.
PDF documents can be highlighted using several PDF viewers both on desktop computers and on tablets, and I believe that the next release of Safari To Go should at least display existing highlights in order to deserve a fourth star. The fifth star could be awarded only when it will be possible to highlight text on the iPad.
McGiova about
Safari To Go, v2.2