As others have said, they take a little getting used to but once you do, you will crush targets. With minimal maintenace they will virtually last forever. I have several Ljutics and have never had one problem with any of them.
One of them is a 70's vintage Dyna Trap. I do not know how many years ago Ljutic stopped making that model but I must have put a boxcar full of shells through it, posted a lot of great scores with it and it never had a hick-up. It is still going strong as my wife now shoots it alot and shoots it well.
Like Leadoff mentioned, all I have ever done to my Ljutics is replace a few hammer springs and I was good to go. The design is extremely strong and simple. If parts are needed, customer service from Ljutic is outstanding.
Some nice Ljutics come up regularly on this site at fair prices. I have personally dealt with Larry Prior who always seems to have a Ljutic or two for sale. He is great to deal with and offers a no fire return if you don't like it. I have also heard Sangamo Special (Terry's Gun Vault) always has some ljutics, is good to deal with and will give you a good gun. Sangamo Special and Larry Prior are regular posters on this site so you should have no trouble finding them.
If you get one, have a little patience in getting used to it and you won't be disappointed.
Give it some time to get used to and you won't be disappointed.