I would say it's always best to get too much time then too little.  If it will be your first time ever meeting with a provider there are two ways to look at it, one is, if you think your going to be nervous it would be best to have enough time to relax and get to know her before moving forward so you can have the opportunity to get the most out of it, the second would be, you know yourself, if you don't think you'll be nervous or have "anxiety" which could interfer then u wouldn't need as much time.  Now for those of you who are not new to the hobby... you guys know, the more time you get the more FUN we have.. wink*  Now on the flip side not everybody has that kind of time all the time, so I understand when shorter sessions can only be done, I try to be understanding and accommodating.  Also, keep an eye on my specials, I'm usually always running one.