Do these really work?

I did some simulated standing hill repeats last night on the trainer. 2 x 6. 1 minute on in 53x11 with trainer setting on high with 1 minute rest between reps and 5 minutes between sets. I have to admit that I am a gotta have it right now kinda guy, so waiting for a certain level of fitness to arrive is tough on da brain. I want to start mixing it up with my routines, but doing some experimenting right now. When you are on the bike outside, it feels as if you are really workin it, on the trainer-it just has a different feel. Eh, maybe just me.