For those employing compact 5-shot revolvers (J-frame S&W, Ruger SP101, Charter Arms, etc.) for CCW, readily available speedloader choices are limited to HKS, Safariland Comp I and the Maxfire type.
I have and have used all of these, in .38 Special/.357.
To date, I've never broken any of them.
The Maxfires are the most bulky to carry and the slowest and most cumbersome to use. They're also the simplest and probably the most durable, being made of a single piece of molded rubber, but those advantages don't offset the bulk and slow reloading time IMNSHO.
The HKS variety "rattles" a bit when loaded, due to the mode of CCW carry typically involving the cartridges straddling the belt (with Bianchi, Andrews and Del Fatti carriers, anyway), which tends to "stretch" the aluminum retainer star pins in the loader, yet it doesn't reduce reliability or cause rounds to fall out of the loader, ever. The HKS loader is shorter in height than the Maxfire but taller than the Safariland Comp I, and requires a clockwise twist of the loader top knob to release the cartridges, which I find quite easy to do though some do not, since there's an extra movement involved. The HKS is the easiest type to find in stores, IME.
The Safariland Comp I is the shortest, and because carry with cartridges overlapping the belt might result in the central plastic star post being depressed (thereby releasing the cartridges), it mustn't be so carried, and IME there's little cartridge rattle, accordingly. It loads the most quickly of the three types, requiring only a solid push of the loader into the cylinder in order to release the cartridges, and is quite quick and reliable.
I've read that these wear out after about 500 uses. If so, I'd consider that to still be a good value. It might be a bit less durable than the HKS, being mostly plastic, though as I say, I've yet to break one. I've never found these in gunstores, and have had to order them from suppliers like Brownells or Midway.
I use both the Safariland Comp I and the HKS, and have no problem with either, though I rather like the Comp I design the better of the two types.
Incidentally, the HKS carries easily with Matt Del Fatti's SLC carrier and the others mentioned, while the Comp I carries well with Matt's SLC-2 carrier, and can be carried in his SLC with a bit of care not to depress the center post.
I won't use the Maxfire type after having tried it. While it's faster than Bianchi Speedstrips, it's so much more bulky that any benefit in speed is far outweighed by inconvenience of carry. The only secure way to carry these, BTW, is to use Maxfire's own double carrier, which is very bulky, and might be acceptable on a cop's duty belt but is way too big for typical civilian CCW.
JMNSHOs, YMMV, as usual.