Dunno what the other dude is talking about, but I've never encountered a bug. It worked as it said in the description. It is extremely useful for all towny servers, I'd highly recommend it :)
While I know the plugin is free, it simply does not live up to the expectations. Sometimes the locks don't seem to function properly, like being able to open when sitting in a falling minecart.
Thank you for the review! Unfortunately I am not able to replicate this bug. If you are able to provide more information about it on discord, please do so. Thank you :)
Edit: Still have yet to recieve any actual information about this. I don't appreciate the destructive review, but I'll give some information for anyone who might be reading this; While I don't believe there is any bug in the plugin which has anything to do with minecarts, there was an oversight on my part in the code which might have caused players being able to open locked containers when they shouldn't have. This quickly got fixed in version 0.6 and is no longer a problem. The plugin now does exactly what it says it does, and I believe that it will provide a great experience for a free price :)