I have many Impact items. I am happy with their quality for the most part. The Battle system is very good and is almot identical to the Tamiya with exception of the mounting base to the the "apple". It is a bit smaller and you can't use a Tamiya apple with an impact base and vice versa. The emitter wires to the the MF are identical. The Impact TU are great and come with a built in /removable 3/1 gear reduction. The metal bases are thin and do not hold the stand-off well I had to add a washer to keepthem spaced a little to prevent stripping out. I have three sets: two in my Jagdtigers and one in my Panther G. The tracks are great but I only have run them on the JP I sold. I do run them on my Pzr III and a Stug III. Sprockets and wheels are first rate too. Beware of mitosals shipping practices and costs.