This was my very first grow, so i have nothing to compare this to. There were no issues during the grow. The plant was pretty small and very bushy. It needed about 3 weeks more than the breeder shows in the shop.
Both 5W Clip Fans broke after 70 days (so 2 fans broke, out of 2 i used), they did not start any more. I got replacement fans, but i have not testet them, yet.
So for the Clip fans zero stars.
The Profan TT Extractor fan is ok. It is still working, but slighly louder than on its first day. I would probably give it 7 out of 10 stars.