Sendmybags experiences

Hi

I am planning to use their service to ship 3 boxes from Ireland to UK. I was wondering if anyone tried them and what is your experience with them? I saw on another post that we must declare each item placed in the box for customs purposes (or else they would be thrown away). is that true? I am planning to use the boxes to put my cloths in it and counting each item would be a huge hassle.

would appreciate the advice.