Capacitor replacement requires very good understanding about the circuit design.
Actually, no, capacitor replacement requires you understand the circuit better than the original designers did! Because there must be reason why the parts failed.
The original parts chosen by professional designers failed i.e. were unsuitable. What are the chances that some random parts from Ebay with no specifications are better suited? You can of course try and with good luck, get a few years more life out of the thing, but tantalums specifically tend to end up in flames when misused.
At the very least you need schematics to calculate ripple current and peak inrush current (latter being relevant with tantalums but not most other types), then choose parts rated for these currents in their datasheets. And remember 40-50% voltage derating for tantalums.
Generic answer to "is this capacitor good" is, "no". All capacitors are crap, meaning the world of capacitors is full of compromises making it pretty difficult to design with them. That's why professionals get paid for their job (and still manage to do it wrong, quite often).
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