Installation was smooth, and quite fast (not meaning the download, which went without problems and maximum speed possible here, too). Zero problems with installing, even if not reading the how-to notes.
and updates intervals:
2.328 came in
January 2007, a quickfix im May 2007.
The Beta 2.370 came in
December 2007.
2.460 came in
april 2009, 16 months later.
2.483 now is considered to be the patch (or "hotfix") needed for the main upgrade 2.460.
In a post one or two weeks ago, Ssnake answerd to q question about how often their will be updates in the future, with "12-18 months", something like that.
2.483 now is listed on their homepage and download list anyway. A delay with less than one day I can live with.
Complete history so far:
GameRelease Date
SB Pro PE 2.262 2006/04/30
SB Pro PE 2.273 2006/06/22
SB Pro PE 2.304 2006/11/13
SB Pro PE 2.328 2007/01/23
SB Pro PE 2.328 Hotfix 2007/05/22
SB Pro PE 2.370 Beta 2007/12/13
SB Pro PE 2.460 Upgrade 2009/04/03
SB Pro PE 2.483 2009/09/02