Anybody use the downspout gutter snake available at wcr?

So I just picked up a large commercial account that wants their gutters cleaned 2x per year. Until this I had pretty much decided I didn’t want to clean gutters anymore because people in my area generally don’t have them cleaned until they’re bent and breaking and I’m really not interested in doing repairs/ installing new gutters. I just want to clean. Anyways… has anyone used the gutter snake available on wcr? If so, how long is the metal tubing? These guttters are square and have two sharp 90 degree bends at the top. I really don’t want to have to take them apart. Should I just get a good plumbing snake instead?

Any help is much appreciated. Thanks in advance.

Oh…and happy fathers day to the Dads out there.