The core problem with instant exchangers is that you cannot see what you are paying. SwapSpace fixes exactly that: enter the pair and amount, and it shows what each of dozens of providers will give you, sorted. The difference between the best and worst quote for the same swap is frequently several per cent, which tells you everything about how this category prices.
No added margin
SwapSpace takes its cut from the providers rather than from the user, so the quote you see is the quote the provider gives. That model is not without incentive problems — providers paying more for placement is a risk in any aggregator — but the direct comparison is visible enough that a systematically bad recommendation would be obvious.
Where accountability sits
You transact with the provider, not with SwapSpace. If a swap stalls, is held for AML review, or settles below the quoted rate, the counterparty is the underlying service. SwapSpace will pass messages along and its support is reasonably responsive, but it cannot release your funds. This is the single most important thing to understand before using any aggregator in this category.
A pattern worth noticing
The cheapest quote is frequently from a provider with a poor record on holds. Price and reliability are inversely correlated here more often than not, because a service that screens aggressively and refunds promptly carries costs that one which sits on disputed funds does not. Sort by rate, then check the provider name against its reputation.
Who should use SwapSpace
Everyone who is about to use an instant exchanger, at minimum as a price check. Then choose the provider deliberately rather than automatically taking the top row.