| The Markbass rack bags are decent. A bit overpriced for the quality, but functionally very good. No overheating issues like with some rack bags, and plenty of cable storage in the top pocket.
A couple of downsideds to me.
1) The head just kind of sits in the bag (versus, for example, the more 'rack bag' designs of some other executions). No way to fasten the head into the bag. Not a huge issue, but given the light weight of the heads, the head can start coming out of the bag when you unplug the cable.
2) The cooling fan and vent holes are just that... holes. So, that is great for allowing the fan to work properly, but leaves the head just a bit exposed if you are slogging to a gig in the rain or something
3) General quality.... cheap zippers and 'average' material.
All in all, the bag works nicely, and fits perfectly (large version for the SA450 sized heads, medium for the LM line, and small for the F line). | 
