I am currently running an ACBC study as well and since the RLH/LL is difficult to interpret I used the Test Design to calculated the standard errors of the part-worth utilities as suggested.
Basically those result are very good, except for the levels of one attribute. The highest value here is 0,0892. Could it be, that this is because the attribute has a lot of levels (21) and I was using a constructed list in the design?
Thank you for your help!