Wings Alliance was formed by one of the original founding members of CTC which may account for the similarity to the CTC-McAlpine scheme referenced further back. It works in conjunction with Bristol Groundschool and certain accepted individual flight schools who provide the training. Hence the 'Alliance' part of Wings Alliance. It's a great concept as it gives students more flexibility and control over their training compared to some of the other bigger FTA's, and for a smaller cost.
The APC is a good course, very intense and will make you work hard, but there is most definitely not a 100% placement rate for their course. I think that reference on their website dates back to the very first course they ran when both students were indeed placed. Remember, everyone is trying to sell you something. Most who have got jobs since their APC have done so on their own or not got jobs at all that I am aware of.
Hope this is of some help.