I have been married 10 years have 2 kids and have all papers including endorsements on passports, marriage certificate etc etc etc.
I came to Germany on employment in Oct 2009. My wife (though has Masters) has been preparing for German A1 exam already for 3 months when I arrived in Germany. She cleared the language exam and applied for Family visa in early Nov 2009. Embassy got all papers and started visa process. After 2 months and tons of more documentation from me (in Germany), the ABH said that they have approved the visa and my family should hear from embassy soon.
Embassy got back after another 10 days saying they needed to do investigative verification. Till this date ABH said that they did not ask for any verification while embassy says that this was requested by ABH ! ANd ofcourse there is no way they will talk to each other directly...ABH says that as far as they are concerned my family is already here !
Anyways we applied for the investigation with required fee and another load of documents which we have in abundance

... At the time of submission the lady at window said that it will take 6-8 weeks to get visa...
It has been 10 weeks since...I do not get reply to my email enquiry from embassy...the responsible person does not seem to be on his seat when I call up...so no information what so ever.
If we consider the German language preparation time it has been almost 8 months for a visa !!!
This has been a taxing time for me and my family ...not sure what to do...
Give or take a week or 2 I will go back to my family...
Just an advice for anyone who is planning to visit Germany for work...Please apply and get your whole family visa before you arrive in Germany... else you would waste a beautiful 1 year of you life and miss out on seeing your kids grow ...