You will need to understand or learn the basics of template overrides in Joomla 1.5+ but installation and customization are not difficult. The only drawback is a common one: the developer's site is cluttered, hard to navigate, and short on well-written documentation, but what you need is in there.
Thank you for your feedback! The latest version 1.1c (released Aug 17th) makes unix permissions configurable in the plugin backend configuration panel (see the advanced parameters). Default values remain 755/644 for directories/files, but any other ones can now be specified.
*Does not do a clean install/uninstall, nor can it install or update all its extensions in a single package.
*Does not use the Joomla menu manager system properly and has no menu views to create. Appears to have major itemID issues which cause pain with common menu systems, core SEF and other SEF systems.
*Non-MVC and default views are extremely poor HTML/CSS.
*Backend interface is extremely cumbersome and poorly designed, making it difficult to manage a big repository with moderately complex permission rules.
*By default files are stored in the database as BLOBs. This is a unique feature, but for various reasons it should not be the default.
*Default icon set is unattractive old Mambo icons.
I would dispute much of this, and note that the author declined to reply to my email request for more and better details of his claims. A lot of this is opinion and ignores the fact that very many people find Remository a highly functional and valuable application. If the author has specific problems, I can only wonder why they have not troubled to raise them, since Remository has a busy forum as well as a robust ticket system for support.