I use 2 of these cables with a Tech21 VT500 bass head and 2 Eden ex112 cabinets.
Firstly, the cables feel chunky and very well made and look like serious pieces of equipment.
Secondly, they really sound like they should cost 10 times as much.
I compared mine with a friends cables which cost £50 each. Through my rig there was no difference in sound (maybe my old ears are not sensitive enough to tell.....).
Through his higher quality Bergantino and Genz Benz rig his higher cost cables had more treble, but I actually preferred the ever so slightly smoother sound of the Thomann Cables.
I have had my cables for around 2 years and have had no problems with them so reliability seems very good for the price also.
I would recommend these cables without hesitation. Well made, great sound and truly fantastic value for money.