I'm studying eLearnsecurity's PTP course. I haven't taken OSCP so I won't be able to compare them. xXxKrisxXx did a nice comparison of both the above courses here
http://www.ethicalhacker.net/component/option,com_smf/Itemid,54/topic,5399.msg30830/#msg30830I think Hayabusa is also enrolled in PTP and has already attained OSCP cert. so he will also be able to provide some valuable input.
1) Is the PTP course well organized?
Yes. It covers 3 modules- Web application security, Network security and System security.
Network security module covers the pentesting methodology and tools. I didn't find anything exceptional here which isn't already in other courses' syllabus- and OSCP's too.
System security module is good and though it covers some sections extensively and just introductory stuff for others.
Web application security module is very good. Armando has written it really well. Out of all the three, I enjoyed this module the most. His web application footprinting methodology and other stuff is really useful.
My opinion of this course is that, it tries to cover a lot of stuff, and achieves this objective to some extent. But, as a result it also misses some some useful stuff. It gives you pointers/introduction to a lot of stuff, but doesn't cover anything in so much detail so as to make you a perfectionist (I specially found this to be a problem with the system security module).
2) Could anyone who has taken training from Offensive Security and eLearnSecurity give opinions on how the two compare? (it looks like the PTP course goes a little more indepth on some topics) Which puts the material into a better organized methodology?
I can't answer this question. However, from what I've gathered through other members' posts, OSCP has lot of labs. You'll be disappointed with PTP as far as labs go. For the few labs there are you'll have to download the software on your machine and practice it.
3) Is it worth the money, especially if you already have OSCP?
Again, I can't compare it with OSCP. I think PTP is a good beginner to medium level course. System security module just touches a lot of stuff but doesn't go in-depth. Network security module covers a good deal of network pentest stuff but nothing exceptional. Web application portion is very good, and what it covers, it covers in detail.
Hope it helps. Feel free to PM me or ask here if you've more specific questions.