not for laserjet 2100
937196
The printer selector said this is the cartridge for the HP LJ 2100.  Not even close. Time to return it.
1671910
This is advertised as "universal" fit, "compatible with BROTHER TN,460, TN,560, TN,570 UNIVERSAL."  An earlier description of this product also made reference to the MFC-8840D (along with a host of other printers), which uses the TN-570 model toner cartridge.  Well, when this arrived, it was in a box indicating only "TN-460," which had me suspicious they shipped the wrong product.  However, the box also had affixed to it a UPC sticker that said "TN/460 TN/560 TN/570 Universal."  So I opened the box, removed the cartridge and tried to insert it into my printer.  It wouldn't fit.  It nearly fit, cartridge has affixed to it a handle-like portion that juts out from the back side and blocks the cartridge from sliding into where it's supposed to go.  So, in other words, it's not compatible.  I've reboxed and am sending it back to Amazon for a refund.
908348
Information from another web site states the 90X cartridge is not compatible with the M601 series LaserJet Enterprise models. Does work with the M602 series, M603 series, and M4555 MFP models. Must use low capacity 90A cartridge with the M601 series. FYI
1017537
This cartridge is not compatible with our Brother laser printer/copier/fax  model MFC 7360N.  The brother MFC continues to indicate the toner is low and needs to be replace.  Finally today it would no longer copy or print.  When I purchased this toner the write up on Amazon did not indicate it was a remanufactured toner cartridge!  The date to return this item has passed (Nov 1, 20130) so we are unable to return it.

Amazon should discontinue carrying this brand and should make sure its sellers clearly disclose when they sell re manufactured items
1426269
It fits into my printer perfectly, but it refuses to work. I will not purchase from this vendor again. I'm purchasing from LD today. I have bought their inkjet to very good results and the black toner that I bought from them for my laser printer works great.
2986941
This particular batch of paper is NOT compatible with laser printer. On the lower right side 1/4 of the print out has ghosting...need to find another vendor
2865119
I followed the advice from the seller (Canon) in ordering these Canon cartridges 4 weeks ago for my Canon MP250 printer. Although they fit in  my printer, it would not function with these inserted. I was obliged to buy #210 cartridges which worked fine. That's $53 dollars down the drain. I was on vacation, so it appears that is now too late to return these. I'm very dissatisfied with the seller's description and that fact that it appears I can't return them.
1660335
I had the previous model and had extra ink that works on this model - had I not I would have ordered a multi-function laserjet
3728296
Definitely does not fit the Canon ImageClass MF4270. No one else seems to have reported this incompatibility, unfortunately for me. Hopefully this will save some one else from ordering these.

Things I've learned:

1. Don't buy toner cartridges unless you can install them within 30 days.
2. Don't trust the "Will this work with your printer?" widget. Look for a report from someone who has your model. Once you find one that fits, stay with it.

Amazon needs to get their act together.
4754284
As soon as I was about to print something, the printer said this cartridge is not compatable. I rather stick to ones that have the number 61 on it. Something isn't right.
313955
I ordered this for my lx500 and the description said it was compatible.  Of course I didn't check until my current labels ran out.  The spool is too big and it won't fit in my printer.  My return window has closed so I'm very disappointed.
3067823
Only the black ink fit my 8100 HP Office jet Pro..  Amazon refunded me for the defective three cartridges as they did not fit.
1386932
Unless you have a black laser printer or you go to the printers this will not work
2791038
If you came to buy these for a Da Vinci 1.0 3D printer, they're the wrong part.

I know that many websites link to here, so I just want to warn y'all.
4573662
Unfortunately, this does not fit in our printer and is unusable. The window for returns on this product has closed. I guess we will go back to buying the brand name ink instead. Do not buy this if you have an Officejet Pro 8620.
1647477
My model printer was listed but these did not work. Got an error message that the incorrect ink cartridge was installed.
1514888
this is the incorrect part for the HP LaserJet 1100.
Item cannot be used and seller will not replace.
Perhaps listing the actual size of the end of cable would assist in determining the fit.
This cable end is about twice the size of the HP connection.