I've done several orders and preorders with them and never had a problem. They're super polite and easy to contact. They're based in Hong Kong so the shipping is usually pretty reasonable and fast.

Haha, I know this sounds like I'm spruiking them. I ordered a Henkei bumblebee from them once. As they were packing my order they noticed a little blemish on the bonnet, emailed me with a photo and asked if it was ok and did I still want to order it. (it was the last one in stock)

I'd rather order through etoys than rk when possible. Only thing is I think they usually have limited stock, so a lot of the preorders retail tfs sell out fast.