I bought this unti to replace a cheaper tama bass pedal I had for years. The first thing I noticed was my feet felt much more capable with these pedals than before. I was able to get more out of my right foot on these than I was with another friends cheap set of double pedals. Also, instead of an "all around" mallet the Twin Cobra uses Hammer style mallets. I'm not sure exactly why, but the hammer mallets give much more ummph and projection to my Kick drum. It sounds much more solid now as opposed to using the cheap tama. The build of the units themselves is also really great. They are what appear to be steel and cast Iron which makes them fairly heavy and durable. I guess the only thing I didn't like about this unit was the cheap plastic case it came with. The case itself is strong and able to withstand a good beating, but the "clips" that keep it closed broke off within weeks. Now it won't stay closed and the only "repair" is to wrap a synch strap around it. I believe these still go for over $300 dollars new so I was very pleased with only paying $175 for a very good condition set. Even at full price, I would still have boughten them as they have brought so much life to my feet when I play drums. I never really liked playing double bass until I got these. Now I'm trying to put double bass into all these songs to my fellow engineers chagrin. I tried the DW dual pedal and that was really nice too but I got a better deal on the Cobras so I bought those. I would definitely make the same choice again.
Iron Cobra pedals (w/double kick power glide hardware) are among the best bass drum pedals on the market. I have never owned these personally but I have played them frequently and have extreme respect for their capabilities. They are all around great pedals and I see them all the time. TAMA has long been known to have extremely solid hardware, but the iron cobras really blew me away. I was never a super double bass heavy player, but most of my friends that play double bass all the time all use iron cobras.
The first thing I have got to say about these is that they are very smooth. I am not exactly sure how they worked it out, because all the springs and connectors look more or less standard, but the pedal control is immense. They are probably the best feeling pedals I have ever played, with both high and low tension being very comfortable. They are easy to adjust and quick to set up. Most models come with a case, which is extremely convenient, especially with the double pedal. There is also a holder for the tuning key underneath the footboard, which is minor but still cool. In my experience, the Iron Cobras are more prevalent in more progressive rock or metal genres of music. This is probably due to the prevalence of double bass work in these songs, but also the fact that the beaters on these pedals tend to create a more compressed sound.
The only reason why this pedal may be at a slight disadvantage is that it has slightly shorter footboards than the axis long boards or the high end pearl pedals. If you are looking for a longer footboard, it should be no surprise that the Axis Long board may be the better choice. Other than that, the Iron Cobra really pushes the envelope of great pedals.