I've been using the Wera Kraftform Big Pack 300 for years. Not because I'm a tool enthusiast, but because at some point I got tired of replacing screwdrivers that wore out after a few years or stripped the moment you applied any real torque. The Kraftform set was meant to be a permanent solution, and it has been.
What's in the set
The Big Pack 300 includes 14 screwdrivers: Phillips PH 1, 2 and 3, Pozidriv PZ 1, 2 and 3, various flat heads, and Torx versions. A wall holder is included. I have mine mounted in the storage room. The set covers about 95% of what you'll encounter around the house. Worth noting is the Laser Tip on the flat and cross-head drivers: a milled surface that increases grip on the screw head and significantly reduces cam-out.
The Kraftform grip
Wera's Kraftform handle is two-component: a hard plastic core with a softer outer material. The shape follows the palm and is multi-sided rather than round, which helps channel torque as you turn. In practice this just means tightening screws takes less effort. After a long session of driving screws your hand doesn't cramp up. That does happen with cheap round-grip drivers.
BIFL: what that actually means here
Wera offers a lifetime warranty against material and manufacturing defects. The steel is Chrome-Vanadium tool steel, the same grade used in professional tools. On forums like r/BuyItForLife this set regularly comes up as the standard answer to 'which screwdrivers should I buy'. Tradespeople in the installation industry use the same Kraftform line. Individual drivers are stocked by professional tool suppliers as a matter of course.
Repairability
You can't replace the whole set under warranty, but individual screwdrivers are available separately. If a PZ2 gives out after twenty years, you order that one driver, not the whole set again. That's the actual BIFL behavior: the lifespan isn't tied to the kit as a bundle, but to each tool individually.
Comparison: Stanley FatMax
The most common cheaper alternative is the Stanley FatMax 10-piece (~€25). It's a solid set for occasional use. I've owned one. Realistically, the tips degrade within 5 to 10 years under normal use. If you get twice as much life out of the Wera set, which is realistic, the per-year cost is lower. But it's not just about money: the Kraftform set feels fundamentally different to use, and you buy it once.
Price
The set runs around €74.95 at bol.com, and you'll find it regularly for €63.95 at Hornbach. That's not an impulse buy, but it's not an unreasonable amount for tools that will last decades. I wouldn't hold out for a sale. The price doesn't fluctuate much and the set isn't going anywhere.
Conclusion
The Wera Kraftform Big Pack 300 is the set you buy when you're done buying. The tips don't strip, the grip works, and the warranty is there if you ever need it. I have nothing negative to say about them. For BIFL tools, that is really the whole point.