Hi Staple,
...
All in all we think its worth looking at, but there are risks as with any investment. We sent a briefing note to clients earlier this year. If you wish pm me your email and I can send you a copy of that. Don't take that as advice but as general observations to help you to assess whether or not its something you should look at more closely. For full disclosure we have no connection to Greenman though we have clients who have invested with them.
All the best Vincent