I tried both Power Score and Harvard Ready before stumbling across this indie firm by chance. I wish I had sooner -- small is beautiful, right? It's run almost entirely by an Osgoode student -- he says he only hires when there's overflow demand.
The website is full of annecdotes and useful law school info (in addition to the LSAT materials.) Nick himself is an awesome tutor. He obviously loves what he does, and it shows. Unlike the large companies, he seems to genuinely care about his students and their successes.
Plus, he's madly entertaining, and invents crazy funny analogies, which made remembering everything a lot easier. My first writing was a disaster, and I promised that if I cracked the 160s in June I would leave a great review. I did, and so here it is. Highly recommended!