Blaster-Time is the leading blaster supplier in Europe, and they know it. They offer a nice selection of products, and I've ordered quite a lot in the last few months, despite the high shipping costs and extra fees for almost any payment method that isn't a bank transfer.
My main criticism is that their communication ranges from slow to non-existent. My last order was on hold for 5 days, and I wouldn't have known the reasons if I hadn't written them several emails. I eventually canceled the order and will order the blaster directly from the manufacturer.
However, when they do reply, they are very polite and nice. I will definitely order from them again, but mainly because there is no real alternative in Europe.
If they manage to improve their communication skills and find a way to cut shipping costs and transaction fees, I will recommend them more actively.