Don't worry, it's not like every MSI mobo out there is bad. They've got to have some good models too, or they'd be out of business. I've read a couple of reviews. In general, IMO, this is a good motherboard, with only minor problems.
Reviewers had a bit of trouble installing a dual-slot video card.
They also said the overclocking is weak and the price is too high.http://www.hardwaresecrets.com/article/462
These guys only complained about how the BIOS looks.http://www.hothardware.com/articles/MSI_P35_Platinum_Motherboard/?page=8
Anandtech reviewers like it, they just aren't very impressed with the simple BIOS and the cooling system (which gets in the way of big coolers or video cards). http://www.anandtech.com/mb/showdoc.aspx?i=3020&p=9
As far as I'm concerned, I'd prefer something with 3 PCI slots because I need all 3.