Terrible. Here's a quote from their mission statement:
Footsteps provides educational, vocational and social support to those seeking to enter or explore the world beyond the insular ultra-religious communities in which they were raised.
As the Gemara says, it's "not the mouse that's the thief, it's hole"-meaning that supporters of thieves, for example, are the real culprits, because without backup and support thieves wouldn't steal. So supporting people who do the wrong thing and giving them an opportunity to do so is wrong and enables bad to continue and flourish.
You seem to be well meaning but I'm sorry to inform you that being "open minded" at the expense of the Torah is not "open mindedness"-it's closed mindedness.
ETA- if their actions were limited to keeping people frum but "more open" that's perfectly fine. However it's my understand that this is not the case and that they support people leaving religion completely (or people becoming less observant about any real mitzvah).