Extremely good. If it weren't for Mark, I wouldn't have known about them. I did, however, slightly mod the ones I ordered. The cables I ordered have QS8 battery connectors, and 6S balance leads...but, for all of my boats that will be running QS8, they run a mixture of 4S & 6S, including two 3S in series. So, I notched the balance leads to accept 3S & 4S packs. Currently, my vehicle & battery collection consists of the following connections - EC2, EC3, EC5, XT60, XT90, QS8, Castle 6.5, and 7mm bullets. My current 'goal' is to have all RCs (with the exception of my helicopter (EC2) & rock racer (Deans)) running either XT60, or QS8.