Interesting enough, but not the most engaging reading experience. I thought that Zelazny's writing style, especially for the time, held up well. It seems that some reviewers dislike the mix of archaic wording with 70's slang, but I was fine to roll with it. I had no trouble becoming immersed in the writing, if not necessarily the narrative. 

The beginning worked best for me. I found that following a character with amnesia, who isn't just frantically trying to get his memories back but is instead trying to bluff his way through some intensely complicated family politics, was a blast. And knowing that Zelazny is beloved by Gaiman, I can definitely see the influence this had on Stardust (namely the similarities between the royal families). The magic system was soft but cool. Amber, and the way that you get to Amber, was interesting. 

That being said, the plot was pulpy (not inherently bad), and the pacing kind of maddening. Simply TOO MUCH HAPPENED. I feel like I have whiplash from the amount of battles/hiding/wins/losses that occurred in (especially the last half of) such a small book. Characterization was flat and inconsistent (and the female characters were the worst off, 'cause white man in the 70's). 

Overall I would say I'm glad I read it, and I think I want to continue a little ways into the series, just to see where things go. But I wouldn't necessarily start recommending it to people or anything. It was fine.