Do not buy, unsafe! Door is sometimes unlocked and can be opened from either.

Property since 2007, the castle 3004 in use. The first has been replaced, has never worked. The second was after 2 years SW error and was also replaced. When third castle I have already 2 times found that the door closed but was not completed. Even after hours you could with the knob out (after 7 sec. Again should rotate freely) still open the door. Of course I was shocked but was thinking of a single fault. None, it happened to me again. Is that bad when you get inside you can not see it or experience without the door to open and look whether the outside knob is unlocked (ie, able to rotate freely without the lock to open).
Castle Guardian said the batteries are empty. Were not the but. Display on the keyboard was also full and a separate battery test was 90% at. Also Castle Guardian mentioned that batteries sometimes closed but that can be opened while the power is then consumed and lacks the power to close it again. Actually quite banal but it is so easy: it takes power to unlock and then again flow to the locks. That's probably a real design flaw also available at the successor models.

If, like me, used the radio transmitter then you do not get with the used batteries. There is no visual or audible indication of empty batteries then. When the batteries that Castle should open delayed, but I can not find. It always reacts times faster or slower, but regardless of the battery level.

I now try on Burgwächter that lock replaced. But do not want the one and also stops responding to emails or something.
Sometimes I think I should Stiftung Warentest report times that Castle Guardian brings an insecure lock on the market (can happen) but it draws no consequences (that is negligence?).
After 3 Defective locks my confidence goes even to the end. Above all, the current problem with a sometimes incomplete door really worries me and actually I can that conclusion with all components (remote control key, SW, etc. in a total value of 400 euros) actually only put in the closet and to change supplier , We want a castle that sometimes the door just does not shut off?

Other experiences are generally that:
- The installation is actually OK. Yes, you have to adjust the length but that is understandable.
- The mechanical design looks a bit cheap and sensitive. Many people complain about damaged cables during installation, but I had not yet.
- The keypad is OK. Simple processing with plastic but is in accordance with the Price
- The PC software is totally outdated (80s Visual Basic GUI), is also not built so logical and updates on new Windows systems come relatively late. The first versions were buggy, now it's a little better but for example installation procedures were on package inserts and very funny (Warning: USB key not plug before SW is installed, etc.). If it runs once then just nothing to change my motto.
- The radio keys are slightly thick. One of 4 was broken up and now the key is a bit hard to press. Since there are much nicer options. But must refer to the price.
- Sometimes the door will not open. On the remote control key and the keyboard no response comes then error message. Only through the emergency to get then still pure. This happens about 1 time per month.

My conclusion: Absolute incorrect investment because the castle has been found to be unsafe and vulnerable. But being vulnerable annoying is the uncertainty is a no-go.