RetireJapan

I routinely buy into crypto every month using bitflyer. But recently found out about Rakuten Wallet. I can't see too much info about it without first signing up, which I'd rather not do unless I'm certain I want to use it. But it seems I get +0.5 SPU if I put in 30k+ in a month, and I usually put in around 50-100k per month into BitFlyer, so I'm happy to move that to Wallet if there's no downsides...

So that gets to my question. Are there downsides? From the looks of things I'm assuming there's only BTC available here based on their advertising. Is there anything else? I basically only buy BTC and ETH so that doesn't bother me, but am I going to be looking at paying a lot more than I would on bitflyer/ less features (limit orders etc)?

Thanks!

Bumping in case this got lost in the sea of threads~

Easy enough to set up, however as far as I am aware the spreads are pretty poor in comparison to some of the more mainstream companies.