The charger is convenient and works. The build quality is perfectly okay though not record-breaking. When charging your battery (Eneloops) done well so far, albeit slowly because the charging current is not very high. Because it has to go with me sometimes fast, or often I use the device only to give "the finishing touches" when time is.
For fast charging, I use a model charger with which I fully get 8 batteries at once in 4 hours, but then the voltages of the individual cells like a bit different. Here then is brought to this unit all back to the same level when it does not have to go fast.