No, not at all. I find them great – no rub, powerful enough to lock wheels without pop-eye’s arms. Not the most beautiful things to look at but very functional.
Pads are a bit fiddly, that’s about the only real downside. As I mentioned the other day, the only reason to upgrade IMO is to get something lighter or a full hydraulic system – which is going to cost!
It’s a shame they dont come with Shimano kit – I pulled the SRAM Apex shifters and rear mech off mine and put Shimano 105 on.
I also changed the chainrings to be use specific – 50/38 on the road, and single ring 40 or 42, I can’t remember, for racing.