I can't stand them as a user. I've never promoted them either.

First users start hating them, then networks - in that order. I have used them, but only when I really, really, wanted something. The other times I couldn't be bothered and left.. I guess that's good and bad

I was thinking to set up a content locker for my website to provide free VALUABLE service for users,what's your opinion on that because that website is gonna cost me hell lot of bucks any alternate solution

I simply find it disgusting. I never used as I thought this could be annoying for readers.

I also hate it. But, standing as the author, we should find the solution for that.
For me, I'll attract repeatitive visitors first, give them valuable contents; they'll know the usefullness of the contents. After that, we could lock some of contents & make it balancing. Reliable and useful for visitors, they wouldn't mind unlocking that contents better than taking out their credit card or pay real cash. In addition, if the contents are really valuable to the readers, I'd give them alternate choice of "Content Unlocking" & "Buying the Content" with the same price I got from content unlocking.

Content lockers work if you have something people really want. They work even better if you get what you unlock because you're likely to get repeat "unlockers". I view Content Locking as a quick way to score a buck with out much care for your visitors. If you have somebody willing to give you information, you are better off in the long run to capture that information for yourself rather than giving it to somebody else for a $1.

I Personally never have and never will promote content locking. Its bullshit.

I can't stand them either, there are other ways to have the same effect that are more "friendly" to the user.. such as offering something free for someone to join a list

Well no offense that is really a common sense question, If you went to a site that had something you think you were interested in would you be annoyed if a content locker popped up asking you to complete a offer to see content,

I know i close the window, There is too many web pages out there that im gonna fight with a content locker to read about a certain category when google showed me 3 other pages of results

content lockers work great with reward sites, if you are using them for just page content that is a sure way to drive users away

I never completed one EVER. That's how much I hate them.

If they weren't almost always a scam they would work well but they are a endless loop of crappy, ridiculous "offers" that never ends and never give you the content you want.

Most people just try them once and never more.

if i see a content locker i click the big X .

Whenever I visit a site and See a content Locker..

I make sure that I never again visit the site..

I just hate them a lot..

but some peoples make huge cash with content locking...

They can work well if they are tailored to your site and the interests of your visitors. The more customization, the better the results.