I barely go there but they keep changing menu so frequently. You might miss some of items you loved because they no longer sell.
They are focusing on premium burger thingies at the moment.
If you are in Japan and wanna taste some good stuff, try *Sasebo Burger* which seems to be somehow happening. It's huge!!
Personally, my favorite burger place is Freshness Burger and their potatos and onion rings are great :-)
Just my two cents.