Looking for feedback on the best ramps.

I have a set of standard ramps and can only just squeeze underneath.

No chance of dieting as I like my food

& beer too much.

I've seen a few sets of the higher ones

(hydraulic and mechanical scissor type) on eblag.

The latter claim to get the car to 400mm, slightly higher than the hydraulic ones.

Are they any good and which are the best ones?