There are a few threads out there with some reviews on the packers

have a look around. From what I've heard about Mango, their customer service is horrible. I've heard of one guy getting his STP 14 months after he ordered it

and some guys not getting anything at all. For Lola.Jake, there isn't really an STP device that comes with it. I think the "STP option" is just a hole that's continued throughout the packer, which you might be able to just do yourself carefully. If you get one of those, you'll have to set up your own tubing and spoon.
Some suggestions you may find interesting are:
1.) DJ Knows Dicks:
http://djknowsdicks.com/2.) STP-FITZ which comes in a medicine spoon model OR a baby-bottle nipple model, which you might find easier to use: look em up at
www.toolshedtoys.com3.) FTM S.T.U.D has many different models as well:
www.gearguygear.com4.) Homegrown prosthetics:
www.hg-prosthetics.com (I think the site is temporarily down, but they look pretty good)
5.) Likereal I'll give you the North American/Outside of Europe site. Guys have had issues with the STP version of this (falling off, not working) so be forewarned:
http://www.likerealusa.com/shop/Good luck

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