I bought the Tri Metric 6 years ago to better understand my battery usage as a prelude to solar. It makes the case that the Puerk Effect is not necessary which starts the Tom Toms. I preferred it's mounting vs the Victron which is also a good unit IMHO. Both require a wiring cable and the Victron has a small circuit board on the shunt which bothered me. My shunt is very exposed to water and dirt from under the MH as are the batteries.
Perhaps the Victron is "better" but the Tri Metric has served me well. After the initial love affair I rarely look at any of the parameters except voltage, amps and SOC (I use %) which I can cycle on the display. This includes a second battery bank voltage.