I went to their website, and wasn’t necessarily impressed with what I saw. Then again, it’s really the materials that speak for themselves.
I think when it comes to Level II, a good review should have 1.) Study Notes that explain the material in a bit more intuitive way than the CFAI books, 2.) Interesting and grabbing lectures that focus on the key material and work through difficult concepts, and finally 3.) Plenty of practice questions/exams that realistically simulate (within reason) the experience you get during the exam.
Honestly, I think #2 and #3 are more important since I think the CFAI books have everything one needs.
Form looking at the sample lectures on youtube, I’d say it’s still a bit of amateur hour in the presentation and personality/interest factor of the lecturer. However, I will say the lecture notes (based on the sample Lvl II Quant book) are very nice and remind me a lot of Stalla lecture notes in terms of format.
Finally, when it comes to practice questions/exams, I really don’t know and would leave it to someone else to review those.
Ranking (based solely on sample material from Elan):
Notes: Elan > Schweser (however, small amount of difference)
Videos: Tie (Stalla beat them both)
Practice Questions/Exams: Unknown.
Scheweser has a nice Qbank with cool customization tools, but I feel the question format is lacking in terms of accuracy in the actual exam (as are most Kaplan products I have used).