I'd say it's worth it, getting IT's stable most of the time based on your set up and maintenance regime is harder when bought at a larger size and the previous owners who grew them out had different habits. I sold off all my largers IT's due to this.
Previous owners never used lights so it was a struggle w/ them hiding and just being blacked out. Even after many different tank set ups as well as lighting changes they were stable once and a while and still hid a lot. Because of that experience I will not own another dat unless it's a ST.
Stick w/ it. Goodluck.