Guiding companies in Ecuador

Hello my enquiry is regarding has anyone done any alpine style climbing in Ecuador's Volcanoes and used a Mountain Guiding company and if so could they reccomend any or definetly non recomend them either way. Am looking at climbing and travelling in Ecuador and starting to get ideas, I have looked at ASEGUIM web site and was helpful. Would appreciate any info on climbing in Ecuador as well. Thank you very much