What do you like best?
Its simple and effective structure attracted me to use Yii. Mainly the object relational concept using gii, widget, extension support. Altogether Yii has active developer contribution. When comes to Forum, it is more effective than any other frameworks in this category. I have developed 2 applications using Yii, and I am very happy with its performance. Speed and caching are the best mechanisms that differentiates Yii from other frameworks. Like other programming languages, Yii is the best framework to support Grid usage in application. Also, in case of database migration, run time logging, doc builder; Yii handles it the best way than any other framework.
What do you dislike?
Recommendations to others considering the product
From my own experience, I would say Yii is simple and effective. You can feel the easiness from the installation itself. In performance vise, Yii is too good. Everything you need to build an application ie, Database migration, Documentation, Extension, Widgets, ORM are there in Yii. So if you are going to build an application, Yii is the best way I can suggest.
What business problems are you solving with the product? What benefits have you realized?
Logistics applications. Performance vice it is good.