Hard to attach, but work great if you can get them to turn on
582372
Very hard to connect the 2 pieces together when they're in your ear, and when it does the light doesn't always work, very finicky and sensitive. Had several compliments when they did work
3500550
Once I figured out how to insert them they worked great.  I guess there is a tool that helps but I figured out how to use a slim punch I had to insert them, stretching them into the  tubing without puncturing and they're holding great so far.  Could use some written instructions with the plugs.
2897554
They work really well, my only problem is I found them to be a little hard to get attached, but I am disabled, and one issue I have is Rheumatoid Arthritis.  I just don't have strength to do it by myself, so normally one of my daughters will help mr#
1602707
They work very well and are solid but I took a star because they are hard to get on and off until you break them in, takes a while.
4343418
Should be easier to install.  Once you figure it out they're great!
1840927
Unlike other add-ons for the track pieces these are not so easy to get in place and to stay in place.  But the work well once you have them attached.
4680306
These are really nice once you get them on.  I had a *really* hard time getting them to close correctly though.
3350943
Kinda a pain to get installed, but works great when it's in
2698154
No  instructions came with how to install these. It took me a few times to get it right and a number of youtube videos to figure them out. But now they are on and work great!
2423598
They're really hard to put in, but once you get it they look really nice.
1305320
These work, but they were a pain in the a** to get on the wire for me. I got the ones that didn't have the side hole. My mistake. Don't get The ones without it. It also isn't enough for a 7 channel setup. But, I'll take that L
107388
These work but don't make it easy to actually latch on and hook. After you hook them to the oil filter, then they work great.
3572536
So far they're working wonderfully. I've gotten many compliments on them. The instructions on how to put them on however are difficult to figure out.
3134551
I haven't been able to figure out how to attach the light, there are no instructions. Very difficult to figure out. Otherwise I hope these might work and be nice. If I can figure out how to put them on, I'll post it here and I might up the rating...
4840108
A little tricky to set programs, but work like a charm.
1422986
I'm not sure what to say about these because they worked.  The problems I found with them are that they are difficult to crimp because of that hard plastic housing and didn't seem to hold really tight on 18 gauge wire.  I had to use channel lock pliers to get them snugly crimped and I used some heat shrink tubing to make a little more secure.  I did find that the female ends have that red housing extending out past the connector inside.  If you get that housing a little warm around the open end, it shrinks too.  That makes it impossible to plug the male ends into.  That's why I didn't give it five stars, I had to redo several of them, but there's plenty left over, so it's not a big deal.  Aside from that, they hold very tight when connected and they work well.
1495174
Stay on just a little difficult to place on , you most likely will need someone else to help you place them on