Ever safe to give a deposition without representation present?

I am a "subject matter expert" in a lawsuit filed by my former employer against a competitor over one of my patents that my former employer has exclusive rights to. I am expecting a subpoena (by the competitor) to give a deposition on the patent. A subpoena was served to the attorneys of my former employer who called to inform me last week. They offered to represent me during the depositon. I told them I'd think about it but I'm inclined to say no. I had a great working relationship with this attorney during the patent application process but am very much disinclined to get back in bed with my former employer in any way at all. Let's just say there are "personality conflicts". I feel safe going into the deposition alone. I don't have a dog in this hunt and I don't see what I have to gain or lose no matter how the case turns out. The case was filed a year ago in Tyler, TX and it sounds like both sides have dug in their heels and this one is going the long haul.