Depends on what you're after, and on your throughput.(posted 8646 days ago)Many photogs use one-shot developer because it's more consistent. All developers that are not one-shot will, obviously, gradually decrease in activity as the effective developing agent is depleted, and oxidation products are accumulated, part of which slow down development. Of course, developer manufacturers formulate their developers so as to ensure the best possible consistency, and the decrease in activity may remain acceptable if you comply with the manufacturer's recommendations concerning capacity. Yet: One-shot developer is naturally more consistent as it hasn't been before.
The second issue to be considered is your throughput: If you only develop one or two films every now and then, developer solutions will oxidise. Working solutions have a much shorter shelf life than concentrates. So you may not be able to exploit the full capacity of your developer.
Third, devlopers for re-use do have one more advantage: You don't have to mix them each time, and if you take them with you (on a vacation, for example) you need only one bottle.
Regards, Thomas Wollstein