I am quite neutral to them, I think that for regular MTT players it would certainly result in lower varience, since it is very easy to make the money. But then you really don't see much significant return on your investment until you make the final table. The difference between 300th and 30th is usually less than 1 full buy in.

There must be some more effective strategies for playing these to optimize your returns, I find I take alot of risks even with a medium large stack after making the money, trying to get a monster stack.