Good enough for professional use.
357564
I am a professional costume designer/fabricator and I use these all the time.  They are reasonable and well-made.
1697019
Work fine and are worth the money. Maybe not good for a professional but OK for the average skilled person.
4329536
These are alright and the ones I used worked fine. They are not what I would call professional quality. If they are exposed to weather or used for anything other light duty applications, you'll be replacing them often. For the price, and the amount of clips you get, it's a good deal.

 They're good for low amp trickle chargers, test leads and low volt jumpers.
2785059
Used set to replace digitizer on cracked iPad 2. Did the job acceptably. By no means professional quality, but good enough for my moderate needs.
2489708
They are definitely not great but they're good enough for occasional use.  The leads could be a bit longer and you'll want to clean the tips before use, but otherwise they're fine for my use and I'm happy with this purchase.
4767927
It's a little bulky to use in my small work space but I've managed to make it work. After some adjustments, I was able to find the right angle to get the best possible lighting. Overall, I like the product. I think it's ideal for taking pictures of objects like shoes or anything smaller. And I didn't have to do any major editing to make my pictures look professional.
3640481
You are getting what you pay for with these. They are good for general purpose stuff but I wouldnt recommend for professional use.
3494967
The valves were sticky, but a little valve oil fixed that easily. The instrument itself is well constructed; it doesn't appear that any components are shoddy or that the manufacturer cut corners. The sound isn't professional obviously, but it does have a nice sound, and is easy to play. The mouthpiece is fairly run-of-the-mill, but by no means poor quality. Finally, the case is sturdy and well padded.

If you're just starting out, this is perfect. If you're a professional, this is a good rehearsal instrument.
3703191
Does the job for a reasonable price, and no special tools needed.

Recommended
219582
I bought these for clamping setups with my drill press and other grinding tools.  I do not use this with a milling machine, so I'm not sure about high stress rigidity, but it is good enough for my purposes.  On problem I have had is that when I clamp to it, the back, un-machined side is far enough from being flat and parallel to the ground faces that it is sometimes hard to set a secure clamp.  Grinding off some of the high points with a disk sander helped a lot.  Accuracy of the machined surfaces is good enough for my purposes.
332201
These worked very well for their price point. Probably not heavy duty enough for the professional user, but if you need a quick hole in tile or stone - these did the trick for me.
3838066
We ordered this for our lab to get a rough idea whether our balance needed to be serviced or not.  This is not a finely honed it, but it provides a base of reference for everyday calibrations.  I wouldn't expect it to be accurate to 4 digits, but our balance was typically measuring withing 2-3 digits (0.01- 0.001), which is fine for our daily common use.  The case is plastic, as are the forceps, but they serve the purpose.  The smaller weights are simply a shaped chunk of metal (aluminum?) with a stamp on them.  Not fancy, but serviceable.  Overall, it serves our needs, and was good value for the price.
469553
This item is not professional quality, but it's great for home use. It works really well. I haven't had any problems with it. The case is a little flimsy so I would be extra carefull with it. Not something I would recommend for a professional needing this everyday, or someone needing to lug it around in a tool case.

But if you are a home user, or would like this for a hobby, it's very handy. It's very easy to read and understand the results.
1697786
Fair enough... pretty good quality for the price.
3216305
Not for professional, production use. I have to set the temperature at nearly max in order to get it hot in
a reasonable time, and it typically stays there or a bit less than max when soldering. It is practical, for the
price it is hard to beat. The handpiece holder comes off very easily so it has to be fixed with a drop of JB
weld or some other method.
3975086
Good value.  Works well for small projects. Not for professional use.
864713
good for gigs, simple design is easy to use. They are wooden not metal as described, but that's fine.