The only negatives I've run into is the long transducer cable and the short power wires of the black box that forced me to have to purchase a separate battery to run the system.
I purchased a LS & a Garmin 93sv (minus the 93sv tdx) from Brian@BBGMarine ($2200), a mounting system from Cumberland Crappie ($100), and the 68ah AGM battery from Auto Zone ($200).
Some say it's better to have the LS & Garmin unit running off a separate battery because their maximum combined draw can be from 4-6amps/hr ... and then others say they've monitored the amp draw and it's way less than that. All I do know is a friend of mine had his starting battery's life shortened severely and switched to using a separate battery (rather than his starting battery). But, I also know that he's prone to fishing 8-10hr days with his LS/93sv system running constantly, plus he fishes a lot more often than the average joe fisherman.
If mounting space is limited, then the extra unit, black box, mounting system, and the LS tdx cable are going to have to be taken into account.
The power wires of the 93sv are about 5' long. The power wires and the black box connecting wires (to the 93sv) are about 8' long. The transducer cable is 10' long. (extension cables can be purchased separately for those wanting to mount the tdx on the transom ... around $70-$80) So, as you can see, it can become quite congested in the mounting area ... depending on the configuration of the bow of your boat.
Even so ... and even though I've only been able to use my setup on two short trips, so far ... I'm glad I got it & am anxious to get the chance to get back out on the water & practice with it and get accustomed to using it for the different methods I intend to use it for (like pitching double jig rigs to cover and Pushing jigs in open water). And even though I have over 30 different rods (for various methods), I went and purchased a 12' BGJP rod just for Pitching jigs with the Livescope system.