For me personally, I wish I hadn't put in the time to take those two exams. I was consistently scoring between 21-25 on my Bootcamp tests, so I was feeling pretty okay (okay no, I wanted to die inside LOL but scoring well made it a little better). Anyway, like 3 days before my test, I took the 2007 and 2009 and scored like 19-20 for AA, and a 17 on Organic Chemistry!!!
I remember freaking out and telling my mom that I wanted to reschedule my test cause I got so scared (honestly idk why I scored so poorly on them) but she told me not to do it, and I also talked to Nancy from DAT Destroyer and she told me how one of the exams (I think 2009) had a lot of errors. If you do take it, be sure to look for those errors (there are a lot of threads on SDN dedicated to them) and grade yourself appropriately.
Of course, this is just my own experience with it. I read a LOT of breakdowns that said that they were much easier than the real thing so I was like omfg what...lol...and I think they are, but because of that, the grading scale is different than the current DAT. I think the current DAT has more mercy lol. Idk if that makes sense. In the end, I scored a 24AA and a 26 in OChem so I definitely didn't feel like it was reflective. DAT Bootcamp was most accurate for me (I scored about 2-3 points higher on each section on the DAT).