Here is a very interesting blog post by Brad Feld who is a prominent VC with the Foundry Group. This post summarizes the experience of a very successful serial entrepreneur (Steve Olechowski, Founder of Blinkfire Analytics) in using AngelList to syndicate their Seed Round.
In Olehowski's words, the key benefits of the syndicate are:
"1) Access to capital we wouldn’t have otherwise been able to raise on angel list [sic], and offline
2) Keeping the number of entries on our cap table relatively small
3) Though #2, we still have the transparency of knowing who the “LPs” are, and can mine them for help if needed"
Click here to read the full post: