Few critics have gone as far as TechCrunch, which has labelled the launch day "a complete disaster", but many blogs and sites have the same specific criticisms: slow loading times and page-load errors, unintuitive navigation, a lack of apps in some key categories, problems signing in with existing Ovi accounts...
For a taster, check reports from All Things Digital, Zdnet, Information Week, Mobile Entertainment and even All About Symbian. There's even an #ovifail hashtag on Twitter, albeit one that's yet to catch on.
The sluggish performance may be due to a launch-day spike - something Nokia has made overt in its apology for the problems:
This is day one, of course. The problems are undoubtedly an embarrassment for Nokia, but over the coming days the most pressing issues will be solved, although it has to be hoped that some of the more fundamental criticisms are also addressed in the coming weeks.
In the meantime, expect the US tech blogs to continue throwing brickbats at Ovi Store, while those within the mobile games industry who want it to be a success pray these are all just teething troubles.