I have ordered a 5D3+Grip from them about 6 months ago and no problems at all. This was my 2nd 5D3, first one was a UK model from Jessops at launch for £3000.
Item arrived in 5 days with no import tax, £1980 for the pair at the time i bought it so a real bargain. They are quite good as they tend to replace the Japan power cord for a UK one and email photos of the box that is being shipped to you so you know they have sent it.
I have also ordered a 35L from them in the past, again within a week for delivery and no problems at all.
A friend of mine has recently used DigitalRev, ordered 2 lenses on a Monday and arrived Wednesday morning from Japan, so pretty much next day which is rather impressive.