It seems your problems are not with Sparx EA, but rather with the BEASI plug-in. Do you think it is fair to downvote sparx for the stability of one of its partners?
I can testify as to its stability. We moved our logical model from Erwin over to Sparx. Erwin crashed on a regular basis, Sparx EA hasn't even once
On the other hand, Sparx EA doesn't enforce UML standards and constraints to the extent that a tool like MagicDraw does. On…
I would like to comment that Sparx has a web interface in beta right now and that there are currently third party tools that enable you to work with EA over the web.