Best pedals i have ever used have been the Saitek Comabt Pedals. I liked the Pro pedals but they didn't last so good. I have not had Simpeds even though I was foing to be the US diatributor before Mr Hoffman passed
When the Saitek pro pedals first came out there was a design issue that allowed them to skip off of their tracks from time to time. You could take them apart and fix it but a month or two later it would happen again.
Saitek mailed me a free set of reinforcement brackets along with installation instructions that were supposed to fix them. Unfortunately I waited for them to pop off track again before I bothered taking them apart and during that time my wife left me and somehow managed to take the brackets with her.Of course right afterwards it happened again so I ended up fabricating my own fix to the problem using some nuts and epoxy but they held up great for a long time after that.
From what I understand Saitek was real quick to correct this problem on the assembly line so after about two months on all of their pedals no longer had this issue. I've seen many hardcore CH fans that love their Saitek pedals but I don't hear too much bad about the quality of the Saitek pedals.
Some CH Pedals do have a wiring problem (looks like it's due to the wiring not being positioned properly into the retaining clips) but for the VAST MAJORITY of units they hold up well and last a long, long time. The only real complaint I see about CH Pedals is their narrow stance. Personally I prefer the feel of the Saiteks as they are more wide and more comfortable but it's all about what you prefer.
Price wise both the Saitek Pro Pedals and the CH Pedals are about the same so really it comes down to personal preference. I have no experience with the Saitek Combat Pedals so I can't say if they're worth the extra money or not.
Personally I now run a modified G940 setup (with its throttle and rudders wired through a separate controller board to bypass the flawed factory firmware) and its pedals physically work reasonably well except they don't want to work smoothly if my feet aren't properly positioned on them.. a little on the 'cheesy' side and I'm sure they'd break if I put all my weight on them but they seem to have been holding up pretty well for the last 18 months or so...