I understand Beagle's feelings. If you are a painter who is looking for high impact models, many Bones will not live up to the quality of a metal mini. The flexibility can be a challenge on the smaller models and the details, though pretty great, just don't match up.
Where Bones really excels is with rank and file type of painting. The Reaper HD paints allow you to paint these minis right out of the box without much prep. It is fast and takes basic techniques like drybrushing well. It may not be a show piece but you will be proud to field a large force of these miniatures without breaking the bank on time or money.
The other place where Bones excels for me is with the larger models. I have found it easier to work with the large models in Bones than their counterparts in metal. The material is much lighter, doesn't break easily and the detail shines through on these larger scale figures. To top it off, the price can't be beat both in material costs as well as the cost of shipping.
With everything considered, I am really excited about another opportunity of a Bones Kickstarter - especially if they concentrate on larger models and more rank and file troups. The price of these models will allow me to build up my collection and still afford to get the premium metal miniatures to highlight my gaming tables.
Bones is not a catch all for every miniature painter but it does offer an affordable solution for the casual gamer who wants good, less expensive models to bring out in their next gaming session.