Hey Jon,
Generally, I've found the service pretty good. I've ordered from them 6 (oops, as of last night, make that 7) times, and the only issue that I've had was an item that wasn't in stock at the time and took 2 months to arrive.
On placing the order, it may take them several days to process (I guess it depends on the volume of orders at the time) and then it's in the hands of the international mail system. Shipping here to Aus, it usually takes about 7 days if shipping by air mail. (Surface mail seems to be more expensive and takes considerably longer - go figure). I'll add that on one occasion I received the shipping notice on a Monday and had the item in my hand on the Wednesday , though I'd expect that that was an exceptional case.
At each stage of the order process, ie. confirmation of order, receipt of payment, dispatch, you will receive an email confirmation, so you usually know what's going on with your order.
From what I understand, if it becomes necessary for them to split an order, you won't get hit up for additional shipping charges - they will carry the cost of additional shipping.
One thing you DO need to take notice of is their stock status flags. If it says "In Stock" it means they have stock on hand. If it says "available" it means that they don't have stock of that item on hand but they can get it from their supplier
Cheers.
BTW: It looks like the order I placed last night has been processed, so I should see it in about a week.