TMs have been around for a long time, and have a great rep amongst many. And they do pretty much everything for the chain running gear, plus a lot of other plastic / nylon products.
But, there is a thread on KTM Talk with a lot of controversy over their warranty.
I take the attitude that nothing is indestructible. So I expect things to eventually cark it. But, TMs wording of their warranty was basically written as a full on , lifetime warranty. That's how they worded it, and a whole heap of people expected it. They did not warrant one / some in the way people expected, so the proverbial hit the fan. They have since re-worded their warranty policy, apparently.
They've a whole heap of models, in a lot of colours. I do know they tend to make a fair bit of extra noise, as they are made of very hard /tough materials.
I usually make my own stuff - pretty much anything, but, whilst in the midst of a few tank and frame projects, and with our dollar finally being worth something against the US dollar, I priced my time.
I ordered a couple of BRP chain guides, as I've no interest in colours (I think they only come in black or white), and I feel they are a better thing than the TM Designs guide. They also do a fair bit more than just guides and guards.
I got them in under a week, and when I did my usual thing and managed to somehow mess up my Internet order, they contacted me and sorted it out within a couple of hours. Good people - Good product - and that's coming from a bloke that is very critical of parts made by others (and myself).