I've built a few Tamiya tanks and purchased IBU2's for some of my Taigen IR tanks because I like to get as close as I can to realism. With the sounds available from Tamiya and the IBU2, along with barrel recoil and drivability, it gets me pretty close to the real thing. I just purchased one of the cheap HL Shermans with the new electronics. And though they (Heng Long) have started down the right track with the proportional turret speed and up for up and down for down barrel movement, the lack of barrel recoil leaves me still looking at Tamiya and Taigen IR tanks. Now improve the Tamiya sounds, make the MFU and DMD smaller and I would be a happy man.