Opera browser is a well known browser. The good thing of this browser is that it is available for different platforms like windows, ios, andoid. I am using this browser for last 2 years. I am using this browser in my iphone and a android mobile.
Opera mini is working perfectly in android mobile but in iphone it is very bad. Opera mini opens very late in iphone.
The main disadvantage of opera mini is that it consumes lot of storage in iphone. Currently it consumes 1 gb storage. This is very bad. It has network issues. Sometimes webpage not opens even while internet is working. The homepage of opera mini is not useful. The browser is very slow. Downloading is also slow. But in android mobile it is working perfect. I suggest all to use this browser only in android mobile.