We have been using this battery from last 4 years with success in our solar projects where we use it as grid-tie storage facility at remote locations without any issues so far.
I would say there are no downsides which can be mentioned here but if you want some specific features then contact us because they will help your project better than others! Yes definitely go ahead since its very cheap compared with other batteries available out there. For all those who wants affordable solutions regarding their electricity needs then i suggest one should look into this product otherwise try looking around google or youtube videos etc., Its perfect solution when used properly even though price might not seem great initially. Our main purpose was storing excess electrical production during day time hours (night shift).