I don't know why Crowdin has such a low score and little reviews in G2 when compare with others.
Our company is new to localization world, I've trial with a lot platforms includes Crowdin, Phrase, Transifex, Lokalise and even open sourced Weblate, Crowdin is the ONLY one makes me feel comfortable on UI/UX, all others have a lot low UI/UX designing except Lokalise, but Lokalise use tooooo many icons and small buttons to hide their functions, that makes me feel bad.
The MOST important thing for a translator (the core of localization) i think is FOCUS. Crowdin's editor makes sure they will focus on "translations" not UI/UX. But others make me feel so noise when I look at their UI.
I wanna vote 10/10 stars to Crowdin's clear and focusable UI/UX, and BTW they have 24/7 support makes me feel good.
As for Smartling... they have no free trial for me, i still waiting for their demo, so if smartling has more clear UI/UX than Crowdin, I guess i will change my word later. Review collected by and hosted on G2.com.