These are rollers for beginners. If you have extensive experience already, these are probably not necessary. I have been using them for over a year and I am still not that comfortable, but I can ride in aero position on the tri bike and stand up while pedaling to give the sit bones a rest.
I'll confirm that they are noisy. The rollers are plastic, so they act to amplify the vibrations. The tolerances are not very tight, so this is where the small vibrations come from. It's not wobbly or anything, it just buzzes.
The front roller is in fact driven by the rear as it is with all rollers. There is no other way to spin the front wheel.
The parabolic shape is very helpful for keeping you in the middle of the rollers.
As for the resistance, you only get the mechanical resistance from the rollers themselves. You can add more by lowering your tire pressure. I weight 145lbs and go down to about 55psi on 23mm tires to get the max effect. Any less than that and it gets pretty squishy for me. I am able to turn nearly 300 watts in that setup, so as these are designed for beginners, you are probably not going to need much more than that. Keep in mind that rollers are mainly for technique refinement, so if you are expecting an all around trainer, you aren't going to get it. I have another trainer for the very hard intervals, and honestly if even I could get 500 watts of resistance out of these rollers, I'd probably fall off anyway.
Rollers take time to learn. Be patient. Be brave. It's probably you and not the rollers. Get a good fan.
The fact that the front roller is driven by rear rollers makes the front end very squirrley, hold on. Being in a hallway
allows me to bounce off walls to stay upright,kinda of a bummer but more practice on it will make perfect they say.