I think I have the same trainer. I only tighten the rear roller tight enough so that the tire does not slip on the roller: I hold the roller with one finger and then try to turn the wheel past it and tighten only enough to stop the slippage. I'll generally keep the remote resistance set on easiest and then use the gears to adjust the workout. On a rare occasion I'll increase the resistence and drop down on the gear to simulate hill climbing.

Considering everything, yes, the trainer is a bit harder to pedal against; I find it easier to pedal at higher cadence out on the road. It's also more uncomfortable on the trainer since there's less shifting of weight, standing up, coasting, etc. Still, I'll use the trainer up to 5 days a week as it's better than not riding at all.