Don't get me wrong guys, I've been on both sides of the fence now
I used to be a train to failure HIT Jedi - and while it worked well, I knew something wasn't right because always felt like I was beaten to a pulp. Training slower and all that. Performance wasn't my main goal. After a while you just get sick of having to turn up at the gym and bringing it.
Then as time went on I had an argument with a friend over our training styles - as all HIT Jedi do
Around this time Performance became more of a goal to me, but size is always nice to have as well.
Something hit (heh) me when I started researching into training methods of elite sprinters and throwers - these guys can really move some iron and have explosiveness to burn.
I then experimented not going to failure, and lifting faster and the results blew me away.
Believe me it took me a lot of guts and determination to switch training styles, but I'm glad I did. Nobody likes to be proven wrong.
I didn't expect to get the gains I did in strength that I did in such a short period of time. And when you get stronger, don't expect your muscles to stay small either!

Heavier weights used will force your muscles to adapt accordingly.
I increased my standing long jump by 7 inches, and vertical jump by 4 inches soon after despite a 12lb rise in bodyweight - and more gains are continually coming.
Sure you have swallow your ego a bit and use lighter weights intially, but in no time at all you will be zooming over your old poundages.
I'm now using weights I once dreamed off - over the last 2 months my Incline dumbell went from 55 for 2 sets of 6, to 90lbs for 2 sets of 5. Not to failure of course. Granted there are many of you much stronger than me here, but for the time I've been training - 90lbs is like some kind of revelation to me. I have never gone higher than 65lbs on incline dumbells BP ever in my life until now.
When I trained to failure and used slow tempos I was stuck on 60-65 for a set of 6, and it seemed like I'd never get past that.
140lb dumbells (largest at my gym) for incline doesn't seem so far fetched for me now, I may even reach that by Christmas, such is the speed of my strength gains. And do you think my upper body will look the same as it does now when I hit 140s ?
Its all about seducing the gains out of your body rather than "raping" them out.