I bought mine in May for 130 from amazon.de. It is still listed there (see
here) but it is 156.99 now. Even at 130, I also felt it was pricey and it was not an easy purchase for me. But I am glad I bought it. If you often find yourself in an environment where you have no access to the electricity grid for days, it is totally worth it in my opinion. If you only need it once or twice a year, I am not sure if it is worth the money. I guess only you can decide if it is worth the price or not.
Performance wise, I have found it to be absolutely fantastic. Yes, it takes an awfully long time for the powerbank itself to charge (about 5 hours if you are starting from 0). But once you have it charged up, charging the
MA batteries is as easy as pushing them into the slots and turning the charger on. It is way more convenient than the DJI charger. I have had absolutely no issues at all with it**. If you have specific questions about it, I will be more than glad to answer them based on my experience.
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**- I have however noticed that it usually charges the batteries to 97% rather than 100%. I am not sure if this is just an isolated case with mine or if it is by design. I normally don't mind this at all; if I need the extra 3% of juice, I wait for a few minutes after the batteries have stoped blinking and turn the charger on again. It tops them off to about 99% that way.