I personally use CRM as I do not believe that canisters should be considered tamper resistant. I hate the idea of renting equipment when affordable monitors are available for purchase. Having said that, I’ve had a terrible experience with Sun Nuclear. I ordered their top of the line 1030 expecting to wait 5-7 weeks. 12 weeks later, I received a defective monitor that had to be returned at my cost. Yup, they made me pay to ship for a warranty repair on a brand new, top of their line, monitor. I did return it for repairs and a couple weeks later they notified me that it had shipped. UPS lost it for a couple of weeks, and needless to say I was pretty upset. The sent me a replacement while UPS located my original monitor. I asked what to do with it, expecting an email with a shipping label in the reply. They replied saying that I had been through enough and could keep the replacement, no charge. Wow! That make up for what I thought was an unusual problem. Unfortunately, the replacement didn’t work either…They apologized and said to return it and promised to ship a replacement. Well the first one was working so I figured it was worth the headache. Wrong! Two weeks after receiving an email saying they had received it, I asked about the status of repair. The response was that they were keeping it. No, I’m not kidding. I confirmed that the anonymous person emailing from support was aware of my experience and that I had it in writing that I would receive another monitor. Tough, their supervisor had reconsidered. At that point, I really regretted ordering the monitor in the first place. Had the waiting period not been advertised as 5-7 weeks, I would have ordered 2 of them originally and was going to order 2 more this winter. They have agreed to accept the return of my original 1030 for a refund but I’ll believe it when I have the money back. I was notified today that they had cancelled production of the 1030. I’ve had good luck with my Radstar 800 so may order a couple more or try the 300. Let us know what you decide Andrew. Good luck!