The overall quality wasn't too bad in most cases, but they had some springs nested inside the grip(s) and if a grip loosened or broke you could be in big trouble. Also the double-action trigger pull was nothing to write home about. Last but not least, most buyers of the big Colt automatic weren't interested in the double-action feature.
Because of it's limited numbers I think the Double Eagle has a great potential as a collectable, and in that context would make a good investment if the gun was in excellent shape and could be purchased at a good figure. But there are better choices if you are looking for a shooter. However if you are well set up for the 1911 platform with leather, magazines, etc. this might be a consideration.