I've sent a few and it's mainly been Couriers Please doing the job.

Acceptance scans can be a bit problematic. If you keep an eye on that you should be ok.

I'll be giving them a bit of work now the price differential has risen to extreme levels.

AP have gone into gouge mode lately and I see even the first tier of bulk buys have had their discount percentages halved from 5% to 2.5%.