Remember when ALL Park TOOLs were made in the U.S.A.? I do. In fact their NAME used to be, "Park Tools USA", but they've since dropped the "USA" part off their name. Whatever.
I have not had any issues that "W. Darling "(brainiac)" has had with "ill-fitting" sizing. All these tools have great fitting tolerances.
I use the crap out of this kit. Mind you, I do have ALL of these sizes in Craftsman and Snap-On, already, but I wanted a tight little kit with all these pieces in one place, without digging into my "motor-tools". I thought I'd use this until it wore out, but it never has.
Firstly, it has EVERY size I have ever needed for "light duty maintenance" on my bicycles (except for #2 Phillips screwdriver (derailleur travel stops), 2mm Hex (Jagwire Hydro Universal Cable Guide), 2.5mm Hex (ODI Lock-On Grips), and 15mm Pedal Wrench - because there are no wrenches)
The "case" or "tray" that it comes in is great. I've used all sorts of socket retaining (usually magnetic) trays and I actually have grown to love how this is just friction. It's really easy to grab a socket and go to town. It's visually laid out perfectly. There are two empty 3/8" slots, that I use to hold a small extention and a Snap-On F734A mini ratchet. That ratchet has 3/8" female drive holes in the bottom, front and back, and the bottom hole fits into the tray nicely. (I actually FOUND that F734A ratchet on the road, while riding my bike one day, and it was CHEWED up. I went to work and warrantee'd it through the Snap-On truck driver and got a brand spanking new one for FREE! It has since been my number one favorite tool)
I use all Snap-On ratchets and Extensions and socket-drivers with this Park Tool SBS-1 kit. That might be one reason I enjoy using it so much. (Snap-On F747A swivel ratchet, F734A mini-ratchet, F50A 3/8" socket driver, and FX4 extension) I digress.
I'll probably add a #2 Phillips 3/8" socket, just for fun, but let me list other tools you'll need in addition to this kit. You'll need a pedal wrench. I enjoy the Lezyne CNC Pedal Rod Pedal Wrench. I have also added all three of the LeZyne 3-way "Y" wrenches, hex and torx, just because they're fun to use, even though they are redundant (except for 2mm and 2.5mm hex keys, and T10 Torx). That's it!
(Of course the list goes on and on, if you want to get deeper into it, but the "most used" section of my tool-box has only the above mentioned tools.)
I like that it has a 25.4mm / 1" socket included in this kit, for using the Park Tools Freewheel Tool and Bottom Bracket tools.
I like that it has a 10mm hex for removing the freehub body. These "bigger" sizes aren't usually in bicycle tool kits.
The chrome finish is no where near as nice as Snap-On, or even Craftsman, but it's not bad! The sockets have all held up great, and they get used a LOT. The size markings look sloppy as well, but they're readable! (I prefer laser etched, personally)
The best part about this SBS-1 kit is the plastic tray, which is not worth much, but it's so convenient, and if you don't already have these sizes, you could do a lot worse.
Accessorize the Park Tool SBS-1 with some good 3/8" drivers and you're all set!
Oh, and I have NEVER USED the following sizes that come with this kit: 9mm socket, 11mm socket, 12mm socket, 13mm socket, and 14mm socket. Cheaper, or older bikes will probably use the 13mm sometimes... (The cable stop thing on Shimano Nexus/Alfine hubs are 9mm, but I don't have one of those - though you might)
I have also never used the T30 Torx, or the T40 Torx.
Okay, out of the 18 pieces in the SBS-1, I have never used 7 of them. That means 38.8% of the sizes are useless. I leave those unused sizes in the kit, because they look good and I don't like empty holes. Hey, it's 61.2% good, and that's how I came up with my three star rating. Enjoy!