I've eaten at Suvan's several times, and while the food is good, it is not outstanding. It's not even the best Thai in Lompoc--we actually ended up trying this place for the first time since our usual Thai place, Thai Cuisine, was closed for almost a month while the owner was on vacation. The curries are good and the menu has lots of options--including some Lao, Chinese, and Vietnamese dishes--but the quality is inconsistent. The last time I ordered pineapple curry with tofu, there were exactly 4 very small pieces of tofu in the dish. I've ordered tofu and meat dishes before and had never encountered this problem before. They include rice with the curry and Chinese dishes (versus many other places in town, where you have to order and pay for rice separately), so that is a plus, but I always find the scoop of rice too small, especially considering how much curry you get in an order.
Service is inconsistent, too. We've had appetizers come out with the food, we've waited ages for the check (so long that my husband went up to the register to pay since we were going to be late for some plans we'd made after dinner), and I've seen diners at other tables get up and go behind the counter for a take-out box since they'd been waiting so long. The wait staff is mildly friendly but not really accommodating, and they even overlook basic things, like the fact that tables don't always have utensils. The wait staff is not unpleasant, just kind of oblivious.
The restaurant itself is not much to look at--certainly not the kind of place to go for a romantic dinner. It's in a strip mall, the tables are fairly close together, there's bright fluorescent lighting, and last time I was there, it was quite cold. They make an attempt to block out the headlights from the cars in the parking lot, but this is only partially successful.
I'd say that this is a decent place to go if you are not in a hurry or are just patient with slow service. It seems that the best option is for take-out since this is the best way to get good food without dealing with the service and atmosphere issues.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.