I used plimus long time ago until switching to paypal, and they were ok, all payments were sent, no delays. Their fees are acceptable.
I've heard good things about them, but seriously I don't really know what's the difference this and paypal merchant service
We have used Plimus now for a few months and have not had any problems so far. They send your funds as promised.
I've been with Plimus for almost 2 years and am looking for a better payment processor. Plimus charges $15 for chargebacks, yet they have a very primitive fraud detection system. Support is slow and not helpful. And they sometimes decide to withhold some of your funds for no apparent reason.
Two of my Payments are refunded and my clients are not agreed to wait for their phone call, so I am thinking of shifting to some other solution..!!