Any problems with Tube Research GTRP preamp.

I am purchasing an older Tube Research preamp GTRP, the one with the 150lb power supply,and just wondered if any one has any experience with this product or the company. Any quirks or problems. Any input would be appreciated.

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Hi. I own this unit - mine built in 1993. I've had nothing fail in it, even with my modifications which put even more stress on the components. Any problems, with the unit, just talk to Paul of TRL. In my experience, the last preamp - period! All the best. Regards, David.