I set mine up a couple of days ago, the deep blue reef ready rimless frag tank (48*24*12) and there hasn't been any leaking since. However I do recommend getting spare bulkheads becuase the ones in the deep blue plumbing kit aren't the best (I did use them but I'll order some as spares, it's a pain to get them to stop leaking)
I have a 60 deep blue rimless for three years now .. great tank love it .. I heard of problems with the bulk head it comes with but I used it .. never had a problem or leak .. good luck and enjoy
I also have the DB 60 Gallon Cube. I haven't experienced any leaking issues at all. Bulk head is not the best but just tighten it up good and you won't have any issues. Looks amazing so I love it.