My 1st year breeding I used a Lay boxes made out of a large tupperware with a large hole cut in the lid and half filled with Spagnum moss. I only had 4 clutches that year but all were laid in their lay box.
I have not used them since. I use mulch as my bedding and when they get withing a week or two of laying I have been giving them fresh mulch ( Still nice and moist ) and put extra in the back of the tub. All my females make nice deep nest back in the extra bedding so I don't feel the need to provide a nest box... That said I use BoaMaster Racks not open Racks so I do think that the Security the nest box can provide is needed since they are hidden on three sides already.