Please do not give us any bad review before contacting us.
We have a free forum support, free support ticket system. So please contact us before submit any bad review.
I don't think you are using this extension. So think is a fake review. It does not have any bugs or issue with the city select option.
Anyway, thank you for your bad review.
I'm sorry you had trouble with the extension. Your site getting slow because of the plugin is very uncommon and might come from server misconfiguration (check your gzip handler).
The plugin is very light-weight and is intended to speed up your website. For problems, please write an e-mail instead of a hasty negative review.
Sorry to read about your dissapointing experience with the BreadCrumbs Advanced module. But testing and unstalling any module/component doesn't always mean it's the cause of website problems.
The Breadcrumbs advanced module is an exact copy of the original breadcrumbs sourcecode from the Joomla! team with a few changes to "cut off" text (breadcrumbs). So nothing is added that could slow down any website.
And remember when you uninstall the module you also set the breadcrumbs module display back in the correct layer (the default one for the template you use). You also can contact us through our webpage for assistance.
If you have still have doubt please visit my site at www.mobilefone.co.cc