It is unlikely that you would break something, though it is possible since it will try to enforce things like unique constraints onto the base tables. Also, schemabinding may prevent schanges to the table schemas which could cause a problem during an upgrade.

The better question is what do they gain you? If you are frequently accessing it through SSMS or if you can change the GUI code so that it can take advantage of the indexed views, then the performance improvements can be extremely impressive. But, if you are primarily accessing the system through a closed source GUI that you cannot direct to take advantage of the indexed view, then it will do you little if any good.

(As a side note, Enterprise edition can use the index on the view if it is useful when you query against the base tables in certain cases, but it does not make a lot of since to create an indexed view with that in mind. If you want to improve access to the base tables themselves, it makes more sense to create the appropriate indexes on them. That is more of an incidental benefit if you are also using the index on the view to access the view.)