I did this course a year or so back. If you express interest they will keep offering you a discount but I don`t remember what I paud in the end - more than I should though.
Depends on your current abilities really. I found it useful for some of the technical aspects and a couple of modules I found quite difficult as I have not been technical enough in my approach and I did learn new things. I got good tutor support and encouragement with very quick turnarounds for assignments. One issue I raised with them which they promised to do something about but failed in my time was the need to link students for some peer support / encouragement which other courss have (eg Open University). I did join a Photography Institute flickr group set up by another student but it flcikered and died.
http://www.flickr.com/groups/photogr...7620298113605/
Just noticed they have started a facebook page for students on the PI site and I know that at least some of the student endorsements are real from previous contacts.
Another point I made was that there was a lot of technical teaching through modules supplied - 11 units of around 65 pages each with the final module being a do it yourself, you`re on your own one- but limited number of actual photograph submissions. A technique I developed was to take advantage of the tutor by submitting links to further images, website development and flickr streams to seek opinion and he usually obliged.
Overall I found the course useful to me at that time in making me think more about technical elements of my work and get to know practical aspects of photography better. I now have a diploma from it which I "claim" on my website but it is of limited value in itself - but then any course other than a degree is and it is your portfolio that counts ultimately.
In terms of other courses I did look at the similarly named Institute of Photography Course and took their big box of materials on approval. Not as good as the PI for me as it was aimed at people aiming to develop their business and returned for a full refund.
A few I know have done the OU T189 course and have highly recommended it too. Lots of peer work there - more so than tutor support but I am actually in a flickr group that is made up mostly of T189 students whoi have striven to stay in touch through challenges on flickr and they recommend it highly.
It`s personal choice in the end but the course delivers according to the laid out module titles on the site. George Seper, food and lifestyle photographer for 30 years is the man behind it and signs his name to the modules but he uses other pro photographers around the globe to support students.
It is not a course / qualification that will open any doors in itself - again only degrees or maybe city and guilds would help in that respect - but it was worthwhile for me.