The main downside is its conflict with the tripod mount, anyone any offers on how to get around that if using Arca plates?
Yes, it's an inconvenience, but I solved it quite easily with a bit of DIY.
I already have an Arca plate attached to the camera, which is turned to point forward, for and aft. I actually prefer it this way as it gives a nice solid and comfy platform to rest in the palm of your hand and I slide the tripod head forward on the plate for perfect balance - that in itself makes a bit difference when locking down the head for accurate framing. But anyway...
This is the plate I use - a 70mm Benro jobbie which you will see has two handy slots in it
http://cgi.ebay.com/Benro-PU-70-Qui...tem&pt=LH_DefaultDomain_0&hash=item3a597ea1ff I then cut a couple of inches off an old camera strap, threaded a loop through and secured it (
very securely) by stitching the ends together with strong thread. It will rip the tripod bush out before the loop gives way. I then clip the R-Strap on to the loop, and do away with the screw in fastener.
I then filed away the lip at the front of the plate so that the loop can fold flat and lie clear of the flush line of the plate on the tripod. It slots on the tripod head perfectly, with or without the R-Strap attached

Edit: you can't see in the pic of the plate, but the underside is hollowed away leaving a cavity about 4-5mm deep with just a lip around the edges for the v-groove.
It took a bit of filing mind - actually, I used a grinding wheel as that aircraft quality aluminium they use is hard as flippin iron. In fact you wouldn't need to do any filing if you just detach the R-Strap first - there's room enough in the cavity under the plate for the loop to fold away clear.
Double edit: if you just have a longer than normal Arca plate and turn it for/aft, just drill a hole in one corner and the R-Strap clips straight on (with a bit of filing for clearance). It works fine, but I prefer using the loop as described above.