We can argue how bad it was but we are talking about multiple different civilisations with different interpretations of islam across hundreds of years. So maybe during some periods it was bad others it was good.
Well I think they say they had it the best in Andalusia. Even tho no real pogrom or holocaust occured on them in the muslim dominion, u can't deny discrimination exist in LAW based on 'xeerka omar' at all times, I mean they had to wear 'symbols' identifying themselves that their jews publically, would have to walk in the sewage not path-ways if a muslim was there, many more horredous stipulations. But was it as bad as a christian europe, NO, but was it 'great' far from it.