Well, I was there during the Media Day event the day before it officially opened. I also saw a few TPR members there as well. This was my first B&M Flyer and the second flyer I've ever been on. The other one is a Flying Dutchman model from Vekoma called Firehawk at King's Island and Manta blew that one right out of the water and into next week. Manta is everything that a B&M coaster is, which means it's smooth and very comfortable. I thought the sound effects that came on when the trains were being raised into their Flying position was neat, it continued through the bottom of the lift hill. The lift hill actually goes over the walkway near the bottom which allows lots of photo opps.
The first drop was really nice, it's actually two feet longer than Tatsu's first drop. Then it goes right into the Pretzel Loop which was a first for me and really fun. there's also a nice pop of zreo-g entering it. From there, the rest of the ride doesn't let up. Following the mid course brake run comes the Wing Dip water splash which is another great photo opp, followed by a high banked turn, a near miss with a water fall, a barrel roll, then a plunge towards the ground before the final brake run.
Sea World also did an excellent job theming the que with a Key West theme on the outside and a underwater theme on the inside with one huge tank and several smaller tanks.
Here's alink to my YouTube video of Manta which includes a walk through of the que after Manta was closed to the public for the media.