CHEAPest way to convert rear axle bolt pattern to big bolt pattern???

It seems like the wheel adapters aren't that bad of a choice as long as you aren't taking them racing. I'm in the same spot upgrading the front to disc but will wind up with mismatched wheels for a while. To skip that headache I'm gonna try these adapters on the back for now. Not a long term fix but it seems like it'll do on my 7.25 rear. Anyone hear of the wheel adapters failing or found any other evidence why they should be completely avoided?