BITSUM main channel is thru messaging app like TELEGRAM but they are planning also to create Windows GUI as well. Let us just wait for that. As Non-Technical person TELEGRAM Wallet is much more easy to use.
The problem is by using telegram online bot wallet, users will totally depend on bot wallet. What happen if the bot die? I think it will be better if finally Bitsum devs publish windows GUI wallet for their users/ supporters.
Then that is one of the worst day for crypto users. We all know TELEGRAM is being use by millions of user so basically bot as one of its feature will not down for a couple of hours or days as many TELEGRAM users are using this. I think Dev has a plan already for this kind of problem.