I've had three deliveries of three tonnes from Balcas, and haven't had any problems at all. Sure, there is a bit of dust each time they deliver, but I expected that.
Have a purpose built silo, nice & dry, inside my garage, and manually feed the hopper every week or so. I remove some of the dust when loading by using a wire basket to lift the pellets, and have never had any problems with the auger getting stuck or that.
Looking at getting my annual service done soon, but haven't had any breakdowns or bother since I started running the boiler (gerkros).
These boilers require a bit of TLC, and need to be cleaned out regular, and kept an eye on generally, but I don't mind that at all, gets me out of the house for a wee while. Its amazing when it needs to be done, usually around the times I don't want to be in the house, funny eh?
As for the pellets breaking easily in your fingers, I wouldn't be expecting them to be like bullets.
And in relation to the camlock fitting, as far as I was aware, Balcas require this on all of the silos they deliver to, as well as my boiler installer recommending it during the building of the silo. Very easy to install.