MS SQL BPA basic questions

If you have run the SQL Server Best Practices Analyzer can you let me know the following:

1.Do you run it per database, or per instance.
2.Do you run it per server, or the server has several instances of SQL installed, do you have to run it however many instances , i.e. once per instance
3. How long roughly does it take to run the scans?
4. What permissions do you need to run the scans?
5. Has running a scan ever caused any issues with the instance being scanned?
6. As a DBA would you recommend not running such a scan at a given time, can you provide some examples of ideal scan times, and times to avoid?
7. Can you install the scanner remotely and scan it from say a PC, or does it need to be run locally on the same server as SQL Server.

i'd much prefer some comments from people who have actually used the tool as opposed to being directed to MS articles...
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pma111Asked:
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Marten RuneSQL Expert/Infrastructure ArchitectCommented:
Yes I have used it. I Believe it was like this:

1 = INSTANCE
2 = PER INSTANCE
3 = Dont remember, it was just a couple of minutes if Im not mistaken
4 = Not sure, Belive it is View Server State on the SQL, and rights to read logs, registry, WMI  and errorlogs.
5 = No, have run it on ca 20 instances all in all
6 = I ALWAYS prefere on a maintenance hole. Off hours (if possible), not while doing maintenance.
7 = I used it remotely. I NEVER install any tools on my precious SQL Servers, so Im 100% sure about this. If I remember correctly it needs PowerShell 2.0

Meant to reply from office, right after I done a BPA, but my kids been sick for a while.
Now I saw you bumbing your thread, and a reply is better than none in my opinion.

Regards Marten
PS I would run it on test system first to get familiare with it.

Oh, did a search and found a short demovideo from MS where BPA for SQL Server is shown:
http://www.youtube.com/watch?v=xU29PXeceD0
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pma111Author Commented:
Has anyone used SQL Server Best Practices Analyzer
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