Oh, yes indeed. Although I do believe SG-1 as a whole never really fell apart much at all. The last few seasons develop into something more different from their earlier forms than the previous seasons did from one-another, but again, such is the nature of long-running franchises.
More on-topic, perhaps -- these early-episode reviews are really making me want to kick it old-school sometime soon. My girlfriend got into the series recently because she watched SGU's premiere a couple of weeks ago and then sat through all of SG-1 Season 9 with me (oops) and is going into Season 10. When she's done with 9, 10 and the two telefilms, I plan on journeying backwards some twelve years to the movie and first season. Then she'll be doing what you're doing!