This bag is a must if you are playing at gigs with a Markbass amp that fit in size for the bag. The material of the bag is high quality and good craftsmanship!
I use the carry bag with a Markbass Little Mark Ninja and is very pleased about the quality and the functionality of the carry bag. For carrying you can use a handle on the side to hold it with your hand or put it on your shoulder or back (like a back pack).
When playing, you never need to take the amp out of the bag, it has holes for the vent fans and also make the amplifier lay softer on the speakers (taking care about vibrations, if any) and it has a pocket for power and speaker cables.
Only thing that could be better is that on the side of the bag (where the vent holes for the fan is), there should be some more material to protect the amplifier when you place the carry bag on the ground (that position is natural if you carry the bag using the handle on the side).
Very good value for money and highly recommended!