I have the VR field and the venue system. The VR field sits in my bag kit for low loader and 2nd unit work. The venue sits in my 19inch rack on my trolley. Both systems have been excellent. The field is quite bulky. I wouldn't want to have it round my neck for too long. Both systems require you to take the top off to access the jumpers to provide power to the aerials. I believe an updated system will have an external switch. Check before you buy
If you don't have a 19inch system on your trolley then buy the field as it will be easy to move it from trolley to bag.