Has anyone recently taken the Vertias CATs? My first Reflections..

Hi GMAT followers,

Yesterday I took the free Vertias CAT to see how it works. I have done all MGMAT and GMATPrep CATs in addition to three actual GMAT exams.
I have to say that Vertias was probably more difficult than the two others I mentioned, in Quant and Verbal questions, though the Integrative Reasoning was easier.

Here are some details:
Quant:
- The Vertias Quant was the only and first Quant that made me 3 minutes behind the schedule at very end. (I usually score 48-50)
- Basically I could notice lots of logics that are derived from OG Quant.
- Some questions in 700+ domain needed more than 3-4 minutes to be solved, unless you knew some math tricks. (e.g. finding the number of multiples that have particular characteristics for a 4 digits integer)
- Data Sufficiency was difficult and standard, as its one of the weaknesses of the Gmat Prep industry, except for MGMAT.

Verbal:
- Sentence Corrections was Okay, a good mix of OG structures and new questions mostly in comparisons, modifiers and pronoun problems.
- Reading was tough with very technical passages and the questions that were focused on Inferences but on general issues. I mean it was not easy to skim the passage and find the source of the inferences later on the passage, because the answer choices were addressing different inferences that referred to different issues of the passage, not only one issue.
- Critical Reasoning was Okay, though some times too long and detailed. In two questions I found it very difficult to pick the correct answer, even after reading the answer choices, so probably this part is slightly different from GMAT. ( not noticeable in the first 10 questions)

I usually score in range 650- 730 on other tests, but on first Vertias I scored 630. I do not know how its algorithm works, though according to my wrong answers, my score seems fair.
These are just my reflections on the free Vertias CAT. I found the exam tougher than actual GMAT but quite challenging for those who want to go further. I mean the higher level of difficulty might be later justified by the stress and exam conditions of actual GMAT.

I can't say these reflections are validated unless listen to your insights. So please share with me any experience you've had with Vertias, because I am considering it to be the main CATs before my next GMAT within two months.
Any suggestion is much appreciated for CAT replacements.

Thanks