Why we tested
At $250, the Breville Fast Slow Pro costs two and a half times the Instant Pot Duo. We wanted to know precisely what that premium buys - not in marketing language, but in measurable cooking outcomes. The adjustable pressure setting is the main claim to differentiation, and we designed tests specifically to evaluate whether it matters in practice.
We tested the Breville alongside the Instant Pot Duo 7-in-1 and Duo Plus throughout the review period, running parallel cooks on identical ingredients wherever the function set overlapped.
How we tested
Pressure cooking at multiple PSI settings: chicken broth at 12 psi (max), 8 psi (medium), and 4 psi (low) across three runs each, comparing flavor, clarity, and cook time. Slow cooker accuracy: temperature probe logged at 30-minute intervals across 6-hour runs on both low (195°F target) and high (212°F target) settings. Salmon fillet pressure cooking at 3 psi for 3 minutes (a recipe the Instant Pot simply cannot execute safely at that pressure range) vs. steaming in the Instant Pot.
Safety valve testing: we confirmed the backup pressure relief triggered at the rated threshold. We also tested the auto keep-warm function and the real-time temperature and pressure display accuracy using a calibrated external gauge.
Pot-in-pot cooking: 7-inch insert for rice while lamb shanks braised in the main pot, across four sessions.
Performance
Pressure cooking results were excellent across all tested PSI levels. Chicken broth at 12 psi came to pressure in 11 minutes and finished the 25-minute cook cycle cleanly - total time through natural release was 57 minutes. Slightly slower to pressure than the Instant Pot Duo, likely due to the more conservative pressure build rate. Broth flavor and clarity were comparable in blind evaluation.
The meaningful difference showed at lower pressure settings. Salmon fillets cooked at 3 psi for 3 minutes produced clean, flaky texture with no rubberiness - a result we simply could not replicate in the Instant Pot without switching to steam mode and losing precise time control. Eggs cooked at 5 psi for 6 minutes came out with set whites and barely-liquid yolks, a texture bracket that’s difficult to nail on a binary high/low pressure system.
Slow cooking was the Breville’s strongest performance category. Temperature hold accuracy on low (195°F target) averaged ±1.8°F across the full 6-hour run - tighter than any other cooker we tested. The Instant Pot Duo averaged ±5°F on the same low setting. For recipes sensitive to temperature precision - overnight bone broth, confit-style preparations - this matters.
The LCD display showing real-time pressure and temperature simultaneously is a genuinely useful feature, not cosmetic. Watching pressure build and knowing when you’re at target changes how you manage cook cycles.
Die-cast aluminum housing feels substantially more substantial than the plastic bodies of every Instant Pot model. The lid latches with a mechanical solidity that suggests durability over a much longer lifespan.
The sealing ring on our test unit maintained a clean seal through all test cycles with no deformation or odor absorption. Release valve action was smooth and consistent.
Who should buy this
The Breville Fast Slow Pro is right for the cook who will actually use adjustable pressure - people who cook fish, eggs, or delicate grains under pressure; anyone doing precision slow cooking; and cooks who simply want the best-built appliance on the market and are willing to pay for it.
If your pressure cooking is primarily beans, broth, and braises at full pressure, the Instant Pot Duo Plus does that for $120 less with no meaningful quality gap for those specific tasks.
Breville Fast Slow Pro Pressure Cooker vs. the competition
| Product | Verdict |
|---|---|
| Instant Pot Duo Plus 9-in-1 | Alternative - half the price, nearly equivalent for everyday cooking if you don't need adjustable pressure. |
| Zavor LUX 8-Qt | Skip - the Zavor is stovetop only; different category despite similar price tier. |
Full specifications
| Capacity | 6 quart |
| Functions | 11-in-1 |
| Max Pressure | 12 psi |
| Dimensions | 14.3 x 12.6 x 13.4 inches |
| Weight | 15.4 lbs |
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Should you buy the Breville Fast Slow Pro Pressure Cooker?
The Breville Fast Slow Pro justifies its $250 price for the cook who actually wants manual pressure control between 2 and 12 psi rather than a single high/low toggle. Build quality is exceptional, the LCD display is the best in class, and temperature accuracy on slow cook mode is tighter than any competitor we tested. It is not the right pick if you want the simplest path to dinner.
Frequently asked questions
Why does the Breville only go to 12 psi instead of 15 psi like other electric cookers?+
Breville deliberately capped maximum pressure at 12 psi as an engineering safety and consistency decision. Most recipes that specify 'high pressure' are written for 10-12 psi, so real-world results are comparable. The lower ceiling also means gentler pressure gradients during release.
How does adjustable pressure actually change cooking results?+
Lower pressure (4-6 psi) is useful for delicate proteins like fish and eggs, where 15 psi would overcook them. Medium pressure (8 psi) works well for grains that tend to blow out at high pressure. You lose the ability to do these things cleanly on any single-level pressure cooker.
📅 Update log
- May 27, 2026Initial review published.
