I thought it to be very good and sw in ethos. Jeff Hunter was believable as a Mexican. I've done a search and found what I had to say in 'last western...' thread ...
"I on the other hand, watched Murieta (ridiculously titled Revenge of Sartana).
An early (1965) spanish/american production that deals with racism and violence against mexican gold prospectors, Joachin Murieta and his wife. Forces of circumstance and the murder of his wife (she gets 'planted' in the ground Phil, - maybe the wife'll appreciate this one) lead him on a cold-blooded path of hate and revenge.
It's a great little morality play revolving around 4 main characters, and there are spaghetti-ish shades of grey at play at times. Jeffrey Hunter is brilliant imo as Murieta; Arthur Kennedy is equally good also as his friend/nemesis, and as the "law is the law" man. Roberto Camardiel plays a sort of Fernando Sancho, larger than life, character called '3 Fingers' and there's a marvellous scene in this when Murietta and 3 Fingers are deciding on wether the latter should hang - the acting in this bit (as in the film overall) is superb, and the puzzled look on Hunter's face is priceless.
The last main character is 'Ham and Eggs' Kate, brilliantly and beautifully played by Diana Lorys.
As you've surely gathered I really enjoyed this."