I had the displeasure of eating at Cantina Agave Beijing last summer and It ranked as one of the worst dining experiences I have ever had. The food was expensive and just downright dreadful. The Margarita was undrinkable (and believe me, I am not a fussy drinker) and tasted like they had salted the entire drink, not just the rim of the glass.
Peter's Tex Mex is my local place here and always hits the spot both on quality and cost, Would be interesting to see how their Shanghai location compares (Hongmei Lu)
What are your reasons behind disliking M on the Bund moondog? Have visited Capital M on numerous occasions and also found it to be an excellent experience, and surprisingly good value for money.
I guess Blue Frog and Element Fresh are much of a muchness - I would love to do a comparison of their different locations but if we traveled to Shanghai and ate where we do all the time in BJ, my missus would think I'm completely barmy!