We have 2 of these at church for Ethernet cables, and apart from the retaining part inside the drum coming loose I can't find anything to complain about. There's a small push fit retainer that holds the reel to the frame and with lots of use this comes loose and falls out, not difficult to refit, just takes a hammer!
Having the extra side cable store is really helpful as we have one cable that doesn't need fully unwinding and it means we can leave a little from the middle available, many reels don't have this and we'd miss it.
Plenty of holes for looping cables through and a clamp to engage to stop the cable unwinding in storage/transit.
Our cables are 30 and 40m and there's plenty of room left so I'd bet anything up to 150m of standard Ethernet would be fine.