I have a very similar charger with different branding and only one channel, and I've had good service out of it. My only concern with that one is that 50 watts per channel is not very much power. It can't deliver 5A into a 3s, and the charge rates for newer lipos seem to be steadily on their way up.
Depending on how you fly and charge, it's up to you to determine if it is more valuable to charge two packs slower or one pack faster, and if you are flying large enough packs to fully use the extra power. If I had the choice, though, I'd spend a bit more money for a two-channel charger with a bit more power than that, probably 100W/channel. Your charger is an item like a transmitter that you will have for a long time.
Another option is: buy this single-channel 100W charger for $65:
https://store.flitetest.com/protek-...-battery-charger-6s-10a-100w-ptk-8522/p696353
Later, you can buy another one, for a total of $130. So you have paid $20 more, but you now have 200W of charger instead of 100W, and have spread out your purchase over a couple paychecks.