I really don't think that these types of 'PPL Quick' courses are a good thing. I totally understand why a market exists for them and would never criticize anyone heading down the commercial road for doing this but I see it as a really important foundation to everything else thats to come. So, I would have to say that whilst the 21 day PPL seems to have come to and end I don't think this is a bad thing because it can only be a good thing if people have taken a bit more time over thier initial flight training.
In my somewhat humble opinion I think it's criminal for people that do a PPL with just a weekend hobby in mind to complete it in a few weeks. I don't say that with a view to pissing anyone off but the more safe flyers around the better right...
Happy Landings!
CS