The thing I don't like about the eco sleep system is the distance between the tarp and the hammock, if there is a breeze and its raining the rain comes into contact with the hammock. This is probably not a problem in jungle but is a concern for UK use.
I have to disagree with others though about the knots, I think they are by far the best feature of this system, once you know what you're doing with them they are incredibly quick and easy. They're just variations on the knots used to put up the Basha/Hoochie, so shouldn't be all that strange to most of you. The system Ray uses to put up and take down the whole set up, is brilliant, very well thought out and makes a lot of sense.
I use a tai hammock from nomad medical with the same knots as on the eco system. The tai hammock is best pitched almost flat, so can be tucked close under the cover of your basha. Also the whole system can be pitched quite low to the ground, which has obvious benefits if you're trying to keep a low profile. (Does the hennesy come in camouflage colours?).
The stainless steel rings are a very good idea too, much better than drip lines alone. I was using karibiners but have since discovered that point north do suitable stainless rings (5mm) and I've switched to them.
I also set up an additional line just beneath the hammock, this gives a handy place to hang your boots up at night. I also hang the dry bag that contained my sleeping bag here to store my clothes over night.
I urge anyone interseted in the system to buy the DVD first and adapt the system to suit you/UK use. Done like this it will be cheaper than an Eco Sleep System and more versatile than a Hennesy.